Percent Change

Front

What is percent change?

Back

Percent change is a way to express how much a quantity has increased or decreased relative to its original amount, calculated as (New Amount - Original Amount) / Original Amount x 100%.

Front

How do you calculate percent increase?

Back

Percent increase is calculated using the formula: ((New Amount - Original Amount) / Original Amount) x 100%.

Front

How do you calculate percent decrease?

Back

Percent decrease is calculated using the formula: ((Original Amount - New Amount) / Original Amount) x 100%.

Front

If a class had 27 students last year and 30 this year, what is the percent change?

Back

11% increase.

Front

If the original amount is 10 and the new amount is 12, what is the percent change?

Back

20% increase.

Front

What is the percent increase when the number of people signed up for a bus trip goes from 32 to 45?

Back

41% increase.

Front

If the price of an item decreases from $80 to $64, what is the percent decrease?

Back

20% decrease.

Front

If the number of dogs decreases from 20 to 5, what is the percent change?

Back

75% decrease.

Front

What does a positive percent change indicate?

Back

A positive percent change indicates an increase in the quantity.

Front

What does a negative percent change indicate?

Back

A negative percent change indicates a decrease in the quantity.