Percents & Percent of Change

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 of a number?

Back

To find a percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What is the formula for percent of change?

Back

Percent of change = ((New Value - Old Value) / Old Value) x 100.

Front

If a bakery sold 50 loaves of bread and 70% were sold in the afternoon, how many loaves were sold in the afternoon?

Back

35 loaves were sold in the afternoon.

Front

What is 72% of 325?

Back

234.

Front

What percent of 60 is 12?

Back

20%.

Front

If the enrollment at a school increased from 1275 to 1350, what is the percent of change?

Back

6% increase.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide by 100. For example, 25% = 25/100 = 0.25.

Front

What does it mean if the percent of change is negative?

Back

A negative percent of change indicates a decrease in value.

Front

What is the relationship between fractions and percents?

Back

Percents are a specific type of fraction where the denominator is always 100.