Percents Review

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'.

Front

How do you calculate 30% of a number?

Back

To calculate 30% of a number, multiply the number by 0.30.

Front

If Sarah earns $20 a day, how much is 30% of her earnings?

Back

$6 (30% of $20 is $20 x 0.30 = $6).

Front

What is the formula to find the percentage of a total?

Back

Percentage = (Part / Total) x 100.

Front

If 200 children attended a play and 40% were boys, how many boys attended?

Back

80 boys (40% of 200 is 200 x 0.40 = 80).

Front

How do you find the number of girls if you know the total and the number of boys?

Back

Number of girls = Total - Number of boys.

Front

If Angeliz made 90% of 50 free throws, how do you calculate the number of successful free throws?

Back

Successful free throws = 50 x 0.90 = 45.

Front

What does it mean to convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add the '%' symbol.

Front

How do you convert 0.506 to a percent?

Back

0.506 as a percent is 50.6% (0.506 x 100 = 50.6).

Front

What is the formula to calculate a grade percentage?

Back

Grade Percentage = (Earned Points / Total Points) x 100.