Percent Proportions Equations and Percent of Change

In a library there are 120 new books. 35 books are fictions, 25 books are biography, and the rest are children books. What percentage of the new books are children books?

• 45%

• 70%

• 30%

• 50%

What is 30% of 450?

• 30

• 135

• 450

• 100

What percent of 25 is 60?

• 24%

• 2.4

• 240%

• 100%

82% of what is 95?

• 115.9

• 77.9

• 100

• 112

Jason spends $450 for transportation. This is 25% of his monthly salary . How much money did he earn each month?

• $1800

• $800

• $900

• $1000

While mining, John found a large metal bar that weighed 25 ounces. John was also able to determine that the bar had 15 ounces of lead. What percent of the weight of the bar was lead?

• 40%

• 50%

• 60%

• 70%

A jogging route is 10km long. Zaman has jogged 4km. What percentage of the route has Zaman jogged?

• 4%

• 10%

• 80%

• 40%

Calculate the percent increase if a price increases from $50 to $70.

• 40%

• 30%

• 60%

• 50%

Solve the percent proportion: 8 is 40% of what number?

• 15

• 20

• 25

• 10

If a product's price is reduced by 20% from $200, what is the new price?

• $160

• $180

• $150

• $170