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.

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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $200 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$200 · 9% · 1 · Simple interest & savings
2. $1900 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$1900 · 5% · 5 · Simple interest & savings
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$300 · 9% · 1 · Simple interest & savings
4. $400 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$400 · 3% · 4 · Simple interest & savings
5. $300 is invested at 3% simple interest per year for 1 year. How much simple interest is earned?
$300 · 3% · 1 · Simple interest & savings
6. $1200 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$1200 · 9% · 2 · Simple interest & savings
7. $600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$600 · 6% · 3 · Simple interest & savings
8. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$1500 · 10% · 4 · Simple interest & savings
9. $700 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$700 · 5% · 5 · Simple interest & savings
10. $100 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$100 · 5% · 3 · Simple interest & savings
11. $1300 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 5% · 2 · Simple interest & savings
12. $1200 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$1200 · 4% · 4 · Simple interest & savings

12 questions · Seed 104736 · 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. $200 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$18
Simple interest I = P × r × t = $200 × 9% × 1 = $18.
2. $1900 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$475
Simple interest I = P × r × t = $1900 × 5% × 5 = $475.
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$27
Simple interest I = P × r × t = $300 × 9% × 1 = $27.
4. $400 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $400 × 3% × 4 = $48.
5. $300 is invested at 3% simple interest per year for 1 year. How much simple interest is earned?
$9
Simple interest I = P × r × t = $300 × 3% × 1 = $9.
6. $1200 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$216
Simple interest I = P × r × t = $1200 × 9% × 2 = $216.
7. $600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$108
Simple interest I = P × r × t = $600 × 6% × 3 = $108.
8. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $1500 × 10% × 4 = $600.
9. $700 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$175
Simple interest I = P × r × t = $700 × 5% × 5 = $175.
10. $100 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$15
Simple interest I = P × r × t = $100 × 5% × 3 = $15.
11. $1300 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$130
Simple interest I = P × r × t = $1300 × 5% × 2 = $130.
12. $1200 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$192
Simple interest I = P × r × t = $1200 × 4% × 4 = $192.

12 questions · Seed 104736 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $200 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$200 · 9% · 1 · Simple interest & savings
2. $1900 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$1900 · 5% · 5 · Simple interest & savings
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$300 · 9% · 1 · Simple interest & savings
4. $400 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$400 · 3% · 4 · Simple interest & savings
5. $300 is invested at 3% simple interest per year for 1 year. How much simple interest is earned?
$300 · 3% · 1 · Simple interest & savings
6. $1200 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$1200 · 9% · 2 · Simple interest & savings
7. $600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$600 · 6% · 3 · Simple interest & savings
8. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$1500 · 10% · 4 · Simple interest & savings
9. $700 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$700 · 5% · 5 · Simple interest & savings
10. $100 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$100 · 5% · 3 · Simple interest & savings
11. $1300 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 5% · 2 · Simple interest & savings
12. $1200 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$1200 · 4% · 4 · Simple interest & savings

12 questions · Seed 104736 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $200 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$18
Simple interest I = P × r × t = $200 × 9% × 1 = $18.
2. $1900 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$475
Simple interest I = P × r × t = $1900 × 5% × 5 = $475.
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$27
Simple interest I = P × r × t = $300 × 9% × 1 = $27.
4. $400 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $400 × 3% × 4 = $48.
5. $300 is invested at 3% simple interest per year for 1 year. How much simple interest is earned?
$9
Simple interest I = P × r × t = $300 × 3% × 1 = $9.
6. $1200 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$216
Simple interest I = P × r × t = $1200 × 9% × 2 = $216.
7. $600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$108
Simple interest I = P × r × t = $600 × 6% × 3 = $108.
8. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $1500 × 10% × 4 = $600.
9. $700 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$175
Simple interest I = P × r × t = $700 × 5% × 5 = $175.
10. $100 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$15
Simple interest I = P × r × t = $100 × 5% × 3 = $15.
11. $1300 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$130
Simple interest I = P × r × t = $1300 × 5% × 2 = $130.
12. $1200 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$192
Simple interest I = P × r × t = $1200 × 4% × 4 = $192.

12 questions · Seed 104736 · Age guidance, not curriculum certification