Math 6/7 Percent Unit Extra Review

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you calculate a percentage of a number?

Back

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

Front

What is the formula for percent increase?

Back

The formula for percent increase is: ((New Value - Original Value) / Original Value) * 100. This gives the percentage increase from the original value to the new value.

Front

Convert 25% to a decimal.

Back

0.25

Front

What is 10% of 150?

Back

15

Front

How do you convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add the percent symbol. For example, 0.75 becomes 75%.

Front

What is 5% of 200?

Back

10

Front

Back

50%.

Front

What is the percent decrease from 80 to 60?

Back

25%.

Front

What is 15% of 400?

Back

60.