Solving Percent Problems

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios and express proportions.

Front

How do you calculate a percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What is 120% of 33?

Back

120% of 33 is 39.6.

Front

How do you find the length of a part when given a percent of the whole?

Back

To find the length of a part, multiply the total length by the percent (in decimal form). For example, if the total length is 50 inches and you need 64%, calculate 50 * 0.64 = 32 inches.

Front

What is 64% of a length of 50 inches?

Back

64% of 50 inches is 32 inches.

Front

How do you find the total number of students if you know the percent that takes the bus?

Back

To find the total number of students, divide the number of students taking the bus by the percent (in decimal form). For example, if 20 students take the bus and that is 40%, then total students = 20 / 0.40 = 50.

Front

If there are 23 girls and 27 boys in a class, how many students are there in total?

Back

There are 50 students in total (23 girls + 27 boys).

Front

What is 40% of 50 students?

Back

40% of 50 students is 20 students.

Front

If 75% of students in a class are 60 inches or taller, how do you find how many that is?

Back

Multiply the total number of students by 0.75. For example, if there are 20 students, then 20 * 0.75 = 15 students.

Front

What is 75% of 20 students?

Back

75% of 20 students is 15 students.