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 value, calculated as (new value - old value) / old value x 100%.

Front

How do you calculate percent increase?

Back

To calculate percent increase, use the formula: ((new value - old value) / old value) x 100%.

Front

How do you calculate percent decrease?

Back

To calculate percent decrease, use the formula: ((old value - new value) / old value) x 100%.

Front

If a class size increased from 27 to 30, what is the percent increase?

Back

11% increase.

Front

If the number of people on a bus trip increased from 32 to 45, what is the percent increase?

Back

41% increase.

Front

Mary lost 30 pounds from her original weight of 180 pounds. What is the percent decrease?

Back

17% decrease.

Front

What is the percent decrease from 90 points to 45 points?

Back

50% decrease.

Front

If an item costs $500 and is on sale for 15% off, what is the sale price before tax?

Back

$425.

Front

What is the final price of an item that costs $500 with a 15% discount and 6% tax?

Back

$450.50.

Front

What does a 20% decrease mean?

Back

A 20% decrease means the new value is 80% of the original value.