Percent proportion

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 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 x 0.20 = 10.

Front

What does it mean if 40% of a group are boys?

Back

It means that out of the total number of people in the group, 40 out of every 100 are boys.

Front

How do you find what percent one number is of another?

Back

To find what percent one number is of another, divide the first number by the second number and multiply by 100. For example, to find what percent 18 is of 24, calculate (18/24) x 100 = 75%.

Front

If 26 is 5% of a number, how do you find that number?

Back

To find the number, divide 26 by 0.05 (which is 5% in decimal form). So, 26 ÷ 0.05 = 520.

Front

What is the formula to convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

How do you round a percentage to the nearest whole number?

Back

To round a percentage to the nearest whole number, look at the first decimal place. If it's 5 or more, round up; if it's less than 5, round down.

Front

What is the relationship between fractions, decimals, and percentages?

Back

Fractions, decimals, and percentages are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.

Front

If 80% of a class of 30 students are passing, how many students are passing?

Back

To find the number of passing students, calculate 30 x 0.80 = 24 students.

Front

What does it mean to find a percent increase?

Back

A percent increase measures how much a value has grown compared to its original amount, expressed as a percentage.