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Compound Interest
Compound Interest Word Problems
100

Yearly

1

100

6 months

t = 0.5

100

3 years

Compounded annually

N = 3

100
P = $13,000; R = 4%; N = semiannually; T = 4 years
What is $15,231.57
100
John invested $16,000 at 3% compounded annually for 7 years. Find A.
What is $19,677.98
200

Semi-annually

2

200

13 weeks

t = 0.25

200

18 months

compounded semi annually

N =3

200
P = $52,500; R = 8%; N = annually; T = 8 years
What is $97,173.84
200
Mary borrowed $450 at 8% compounded semiannually for 3 years. Find A.
What is $569.39
300

Monthly

12

300

38 months

t = 3.17

300

52 weeks

Compounded weekly

N = 52

300
P = $453,900; R = 12%; N = quarterly; T = 3.5 years
What is $685,203.15
300
Carlos invested $147,000 at 13% compounded monthly for 5.5 years. Find A.
What is $299,342.20
400

Quarterly

4

400

100 days

t = 0.27

400

8 days

Compounded daily

N = 8

400
P = $3,927; R = 14%; N = monthly; T = 1.5 years
What is $4,838.77
400
Jeremy borrowed $96,300 at 3% compounded annually for 8 years.
What is $121,989.96
500

Weekly

52

500

344 weeks

t = 6.62

500

16 months

Compounded quarterly

N = 5.33

500
P = $64,000; R = 5%; N = quarterly; T = 3 1/4 years
What is $75,216.89
500
Ken invested $372.28 at 7% compounded quarterly for 2 2/3 years. Find A.
What is $447.96