Percent Change

Front

What is percent change?

Back

Percent change is a way to express a change in a quantity as a percentage of the original amount. It can be an increase or a decrease.

Front

How do you calculate percent decrease?

Back

Percent decrease = ((Original Value - New Value) / Original Value) x 100.

Front

How do you calculate percent increase?

Back

Percent increase = ((New Value - Original Value) / Original Value) x 100.

Front

What is the formula for finding the original price after a percent decrease?

Back

Original Price = Sale Price / (1 - Percent Decrease).

Front

What is the formula for finding the sale price after a percent decrease?

Back

Sale Price = Original Price x (1 - Percent Decrease).

Front

If a price decreases from $80 to $64, what is the percent decrease?

Back

20%.

Front

If a scooter's regular price is $65.50 and it is on sale for $52.40, what is the percent decrease?

Back

20%.

Front

John grew from 4 feet 11 inches to 5 feet 2 inches. What is his percent increase in height?

Back

5%.

Front

If Mrs. Ciampa had 27 students last year and 30 this year, what is the percent change in her class size?

Back

11%.

Front

The number of people signed up for a bus trip increased from 32 to 45. What is the percent increase?

Back

41%.