Percent Proportions and Percent Change

Front

What is percent change?

Back

Percent change is a way to express a change in value as a percentage of the original value. It is calculated using the formula: ((new value - old value) / old value) x 100.

Front

How do you calculate the percent increase?

Back

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

Front

How do you calculate the percent decrease?

Back

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

Front

What is 10% of a number?

Back

To find 10% of a number, multiply the number by 0.10.

Front

What is 70% of 30?

Back

70% of 30 is 21.

Front

What percent of 20 is 18?

Back

18 is 90% of 20.

Front

If a shirt costs $50 and is on sale for $40, what is the percent decrease?

Back

The percent decrease is 20%.

Front

What is the formula to find the original price before a percent increase?

Back

Original Price = New Price / (1 + Percent Increase)