Percents

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 convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100. For example, 2/5 = (2 ÷ 5) × 100 = 40%.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 80 is 40.

Front

How do you find the percent of a total?

Back

To find the percent of a total, divide the part by the whole and then multiply by 100. For example, if there are 4 tulips in a garden of 10 flowers, the percent of tulips is (4 ÷ 10) × 100 = 40%.

Front

What is the formula to calculate percent change?

Back

The formula for percent change is: ((New Value - Old Value) ÷ Old Value) × 100. This shows how much a value has increased or decreased in percentage.

Front

If 65% of students buy lunch, what percent do not buy lunch?

Back

If 65% buy lunch, then 100% - 65% = 35% do not buy lunch.

Front

What is 25% of 200?

Back

25% of 200 is calculated as (25 ÷ 100) × 200 = 50.

Front

How do you express 0.75 as a percent?

Back

To express 0.75 as a percent, multiply by 100. So, 0.75 × 100 = 75%.

Front

What is the percent of boys in a class with 4 girls and 16 students?

Back

If there are 4 girls in a class of 16, then there are 16 - 4 = 12 boys. The percent of boys is (12 ÷ 16) × 100 = 75%.

Front

How do you calculate 10% of a number?

Back

To calculate 10% of a number, divide the number by 10. For example, 10% of 50 is 50 ÷ 10 = 5.