Proportions
Percent Equation
Percent of Change
100

30 out of 40.

75%

100

70 out of 120

58.3%

100

New: 200

Old: 120


66.6% Increase

200

37.5% of 32.

12

200

35% of 75

26.25

200

Old: 65

New: 30

53.8%


Decrease

300

Riley had 52 at bats this past season. He had 13 hits in those at bats. What percentage of Riley's at bats are hits?

25%

300

An automobile dealership has 224 vehicles to sell at the beginning of the month. By the end of the month, only 28 of those vehicles were not sold. What percent of the 224 vehicles were not sold during the month?

12.5%

300

Rebekah bought a computer for $900. After 5 years the value of her computer was $120. What is the percent decrease in the value of Rebekah's computer?

86.6% Decrease

400

For a school play, 95% of the tickets available were sold. A total of 280 tickets were available for the school play. How many tickets were sold?

266 tickets

400

Working as a sports agent, Imani earns a percent of her client's income, or a commission. One of her clients earned an $80,000 signing bonus which resulted in a $10,400 commission for her. What percent commission did Imani earn on the signing bonus?

13%

400

Brad earns an annual salary of $48,000. This year, he receives a raise that increases his annual salary to $49,200. What is the percent increase in Brad's salary?

2.5% Increase

500

Aiden is buying a collectible coin for his collection for $20. If there is a 7.75% sales tax on the purchase, how much will he pay in tax when he buys the coin?

$1.55

500

A construction crew is mixing concrete to pour the floor for a new building. To meet the building regulations, 40% of the concrete mixture should be sand. The crew needs 12 cubic yards of concrete for the floor. How much sand must they use so that the floor meets the required regulation?

4.8 cubic yards of sand.

500

The number of visitors to an aquarium last year was 4,600. This year, the number of visitors was 5,100. What is the percent of change in the number of visitors to the aquarium?

10.8% Increase

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