Percent - Word Problems

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 30% of 2400, calculate 2400 * 0.30 = 720.

Front

What is the formula to find the total number of students taking the bus if 40% of them do?

Back

Total students taking the bus = Total students * (Percentage taking the bus / 100).

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100. For example, 12/30 = 0.4, which is 40%.

Front

What is the formula for calculating simple interest?

Back

Simple Interest = Principal × Rate × Time. For example, if you invest $480 at 4.6% for 1 year, the interest is $480 * 0.046 * 1 = $22.08.

Front

How do you find the percentage of a group that meets a certain criterion?

Back

Percentage = (Number of individuals meeting the criterion / Total number of individuals) * 100.

Front

What does it mean if 40% of cars finished a race?

Back

It means that out of all the cars that started, 40 out of every 100 cars finished the race.

Front

How do you round a percentage to the nearest tenth?

Back

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

Front

What is the maximum number of calories from fats if 30% of 2400 calories should come from fats?

Back

The maximum number of calories from fats is 720.

Front

If there are 32 students in a class and 9 are women, how do you find the percentage of men?

Back

Number of men = Total students - Number of women = 32 - 9 = 23. Percentage of men = (23 / 32) * 100 = 71.9%.