Percent Problem Solving

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 30% of a number?

Back

To calculate 30% of a number, multiply the number by 0.30 (or 30/100). For example, 30% of 20 is 20 x 0.30 = 6.

Front

If Sarah earns $20 a day and spends 30% of it, how much does she spend?

Back

Sarah spends $6 on Monday.

Front

What is the formula to find the percentage of a part compared to a whole?

Back

The formula is: (Part/Whole) x 100 = Percentage.

Front

How many girls attended the school play if 200 children attended and 40% were boys?

Back

120 girls attended the school play.

Front

What percent grade did Shirley get if she spelled 12 out of 15 words correctly?

Back

Shirley got an 80% grade on the test.

Front

How do you find the percent of a total that a part represents?

Back

Divide the part by the total and multiply by 100. For example, if there are 10 tulips in a garden of 20 flowers, the percent of tulips is (10/20) x 100 = 50%.

Front

What percent of a class of 16 students are boys if there are 4 girls?

Back

75% of the class are boys.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

How do you convert a percentage to a decimal?

Back

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