Percents and Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate a percent increase?

Back

To calculate a percent increase, subtract the original value from the new value, divide by the original value, and multiply by 100.

Front

How do you calculate a percent decrease?

Back

To calculate a percent decrease, subtract the new value from the original value, divide by the original value, and multiply by 100.

Front

What is the formula for finding the percent of a number?

Back

The formula is: (part/whole) x 100 = percent.

Front

If a shirt costs $40 and is on sale for $32, what is the percent decrease?

Back

20% decrease.

Front

What is the new salary if a person earns $5000 and receives a 10% raise?

Back

$5500.

Front

If a car is bought for $20000 and depreciates by 15%, what is its value after a year?

Back

$17000.

Front

What is the percent increase if the population of a city goes from 500,000 to 550,000?

Back

10% increase.

Front

How do you solve the percent proportion: 15 is what percent of 75?

Back

The answer is 20%.

Front

What does it mean if a value decreases by 30%?

Back

It means the value is reduced to 70% of its original amount.