Write and solve a proportion
Find the new Amount
% of change or % error
100


What number is 24% of 80?


19.2

100

$45 increased by 28%

$57.60

100


72 paper clips to 63 paper clips

12.5% decrease 

200


15 is 30% of what number?


50

200

17 feet decreased by 8%

15.6 ft or 15.64 ft

200


24 songs to 78 songs


225% increase

300


75% of 124 is what number?


93

300

$120 decreased by 85%

$18

300


You estimate the length of the building is 123 ft. The actual length of the building is 155 ft. What is the % of error?

20.6%

400


22 is what percent of 52?


42.3%

400

25 meters increased by 120%

55 meters

400

75 people to 25 people

66.6% or 66.7%

500


What number is 0.4% of 40?


0.16

500

60 apples increased by 105%

123 apples

500

There are 222 people at the ball game. You predicted that there was 179 people at the game. What was your % of error?

19.3% or 19.4%