Percent of Change Proportion Discount

A ratio that compares a number to 100

• percent change

• product

• rate

• percent

The amount by which the regular price of an item is reduced

• quotient

• product

• discount

• inequality

A ratio that compares the change in a quantity to the original amount.

• percent change

• percentage

• percent error

• complex fraction

Find the Percent of Change. Round to nearest Percent.

Microwave: Originally $96 then price increases to $115.20

• 20% increase

• 20% decrease

• 17% increase

• 17% decrease

• A
• B
• C
• D

A $52 sweater is on sale for $31.50. What is the percent of discount? *Hint: This is percent of change*

• 39.4% discount

• 0.651 discount

• 65.1% discount

• 0.394 discount

What is the percent change when a quantity increases from 100 to 150?

• 25%

• 50%

• 75%

• 100%

A lawn mower is on sale for $120. If the original price was $159, which choice is closest to the discount percentage?

• 39%

• 33%

• 25%

• 20%

Answer explanation

New price is 120, old price is 159. So first 120 - 159 = -39.

-39/159 = -0.245

-0.245 x 100 = 25%

Calculate the percent change from 50 to 75.

• 25%

• 50%

• 75%

• 100%

A jacket is originally $50.00. It is on sale for $25.00. What is the percent of the discount? 

• 10%

• 20%

• 25%

• 50%