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 Amount - Original Amount) / Original Amount x 100%.

Front

How do you calculate Percent Increase?

Back

Percent Increase = (New Amount - Original Amount) / Original Amount x 100%.

Front

How do you calculate Percent Decrease?

Back

Percent Decrease = (Original Amount - New Amount) / Original Amount x 100%.

Front

If the original amount is 72 and the new amount is 7, what is the percent change?

Back

90% decrease.

Front

If a class size increases from 35 to 42 students, what is the percent of change?

Back

20% increase.

Front

What does it mean if the percent change is positive?

Back

A positive percent change indicates an increase in the quantity.

Front

What does it mean if the percent change is negative?

Back

A negative percent change indicates a decrease in the quantity.

Front

If Mary lost 30 pounds from 180 pounds, what is the percent of change?

Back

17% decrease.

Front

If the price of a softball glove decreased from $60 to $36, what was the percent of decrease?

Back

40% decrease.

Front

What is the formula for finding the new amount after a percent change?

Back

New Amount = Original Amount + (Percent Change x Original Amount) / 100.