Time & moneyAges 16-18

Simple interest & savings

Use I = Prt to calculate simple interest earned on a principal sum over a number of years. Review suitability for your learners before teaching.

New variation Try interactive challenge Browse templates

Age band:Ages 13-15 Ages 16-18

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $2000 is invested at 3% simple interest per year for 3 years. How much simple interest is earned?
$2000 · 3% · 3 · Simple interest & savings
2. $700 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$700 · 8% · 4 · Simple interest & savings
3. $1300 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$1300 · 4% · 3 · Simple interest & savings
4. $300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$300 · 2% · 4 · Simple interest & savings
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$1400 · 4% · 4 · Simple interest & savings
6. $100 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$100 · 2% · 5 · Simple interest & savings
7. $1000 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$1000 · 10% · 6 · Simple interest & savings
8. $1400 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$1400 · 6% · 3 · Simple interest & savings
9. $1500 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1500 · 2% · 5 · Simple interest & savings
10. $2000 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$2000 · 9% · 4 · Simple interest & savings
11. $800 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$800 · 5% · 5 · Simple interest & savings
12. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$400 · 8% · 1 · Simple interest & savings

12 questions · Seed 104731 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $2000 is invested at 3% simple interest per year for 3 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $2000 × 3% × 3 = $180.
2. $700 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$224
Simple interest I = P × r × t = $700 × 8% × 4 = $224.
3. $1300 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$156
Simple interest I = P × r × t = $1300 × 4% × 3 = $156.
4. $300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$24
Simple interest I = P × r × t = $300 × 2% × 4 = $24.
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$224
Simple interest I = P × r × t = $1400 × 4% × 4 = $224.
6. $100 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$10
Simple interest I = P × r × t = $100 × 2% × 5 = $10.
7. $1000 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $1000 × 10% × 6 = $600.
8. $1400 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$252
Simple interest I = P × r × t = $1400 × 6% × 3 = $252.
9. $1500 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$150
Simple interest I = P × r × t = $1500 × 2% × 5 = $150.
10. $2000 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$720
Simple interest I = P × r × t = $2000 × 9% × 4 = $720.
11. $800 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$200
Simple interest I = P × r × t = $800 × 5% × 5 = $200.
12. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$32
Simple interest I = P × r × t = $400 × 8% × 1 = $32.

12 questions · Seed 104731 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $2000 is invested at 3% simple interest per year for 3 years. How much simple interest is earned?
$2000 · 3% · 3 · Simple interest & savings
2. $700 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$700 · 8% · 4 · Simple interest & savings
3. $1300 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$1300 · 4% · 3 · Simple interest & savings
4. $300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$300 · 2% · 4 · Simple interest & savings
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$1400 · 4% · 4 · Simple interest & savings
6. $100 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$100 · 2% · 5 · Simple interest & savings
7. $1000 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$1000 · 10% · 6 · Simple interest & savings
8. $1400 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$1400 · 6% · 3 · Simple interest & savings
9. $1500 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1500 · 2% · 5 · Simple interest & savings
10. $2000 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$2000 · 9% · 4 · Simple interest & savings
11. $800 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$800 · 5% · 5 · Simple interest & savings
12. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$400 · 8% · 1 · Simple interest & savings

12 questions · Seed 104731 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $2000 is invested at 3% simple interest per year for 3 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $2000 × 3% × 3 = $180.
2. $700 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$224
Simple interest I = P × r × t = $700 × 8% × 4 = $224.
3. $1300 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$156
Simple interest I = P × r × t = $1300 × 4% × 3 = $156.
4. $300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$24
Simple interest I = P × r × t = $300 × 2% × 4 = $24.
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$224
Simple interest I = P × r × t = $1400 × 4% × 4 = $224.
6. $100 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$10
Simple interest I = P × r × t = $100 × 2% × 5 = $10.
7. $1000 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $1000 × 10% × 6 = $600.
8. $1400 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$252
Simple interest I = P × r × t = $1400 × 6% × 3 = $252.
9. $1500 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$150
Simple interest I = P × r × t = $1500 × 2% × 5 = $150.
10. $2000 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$720
Simple interest I = P × r × t = $2000 × 9% × 4 = $720.
11. $800 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$200
Simple interest I = P × r × t = $800 × 5% × 5 = $200.
12. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$32
Simple interest I = P × r × t = $400 × 8% × 1 = $32.

12 questions · Seed 104731 · Age guidance, not curriculum certification