This topic practices calculating the final amount of money given an initial principle and a certain percentage of interest. Multiple problems are presented where interest rates, based in 10% increments, are added to a specified principle amount. The learner is to determine how the principle amount changes by these percentages, such as 60%, 90%, and up to 100%. Each problem provides multiple-choice answers.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

more
View

Percent growth of money (principle and interest) (10% multiples) Worksheet

Mobius Math Academy logo
Percent growth of money (principle and interest) (10% multiples)
1
Add 80% interest to $30 principle
Calculate the final amount when it changes by a percentage
a
$78.30
b
$35.10
c
$54.00
d
$43.20
e
$48.60
f
$32.40
2
$70 principle grows by 70% interest
Calculate the final amount when it changes by a percentage
a
$148.75
b
$119.00
c
$166.60
d
$71.40
e
$160.65
f
$95.20
3
Add 70% interest to $40 principle
Calculate the final amount when it changes by a percentage
a
$44.20
b
$57.80
c
$85.00
d
$68.00
e
$78.20
f
$74.80
4
Add 100% interest to $80 principle
Calculate the final amount when it changes by a percentage
a
$160.00
b
$208.00
c
$120.00
d
$112.00
e
$104.00
f
$136.00
5
40% interest on $40 principle
Calculate the final amount when it changes by a percentage
a
$70.00
b
$56.00
c
$47.60
d
$28.00
e
$50.40
f
$58.80
6
$10 principle plus 40% interest
Calculate the final amount when it changes by a percentage
a
$8.40
b
$14.00
c
$20.30
d
$11.90
e
$7.70
f
$12.60
7
100% interest on $100 principle
Calculate the final amount when it changes by a percentage
a
$200.00
b
$190.00
c
$170.00
d
$290.00
e
$270.00
f
$250.00
8
80% interest on $70 principle
Calculate the final amount when it changes by a percentage
a
$107.10
b
$94.50
c
$126.00
d
$151.20
e
$100.80
f
$119.70