Percent of Change

Front

What is Percent of Change?

Back

Percent of Change is a way to express how much a quantity has increased or decreased in relation to its original amount, calculated as (New Value - Old Value) / Old Value x 100%.

Front

How do you calculate Percent Increase?

Back

Percent Increase = (New Value - Old Value) / Old Value x 100%.

Front

How do you calculate Percent Decrease?

Back

Percent Decrease = (Old Value - New Value) / Old Value x 100%.

Front

If a price increases from $50 to $60, what is the percent increase?

Back

20%.

Front

If a price decreases from $80 to $60, what is the percent decrease?

Back

25%.

Front

What is the formula for finding the new value after a percent increase?

Back

New Value = Old Value + (Old Value x Percent Increase).

Front

What is the formula for finding the new value after a percent decrease?

Back

New Value = Old Value - (Old Value x Percent Decrease).

Front

If the enrollment at a school increases from 400 to 460 students, what is the percent increase?

Back

15%.

Front

If the number of speeding tickets decreases from 100 to 75, what is the percent decrease?

Back

25%.

Front

What does a 100% increase mean?

Back

A 100% increase means the new value is double the old value.