Percents #2

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'.

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 25% of 200, calculate 200 x 0.25 = 50.

Front

What does it mean to find 35% of a total amount?

Back

Finding 35% of a total amount means calculating how much 35 out of every 100 parts of that total is.

Front

If 55% of a number is 132, how do you find the original number?

Back

To find the original number, divide 132 by 0.55. The original number is 240.

Front

What is the formula to find the percentage of a total?

Back

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

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 75% becomes 0.75.

Front

If 25% of a class earned an A, how do you find the number of students who earned an A?

Back

Multiply the total number of students by 0.25. For example, if there are 120 students, then 120 x 0.25 = 30 students earned an A.

Front

What is 50% of a number?

Back

50% of a number is half of that number. For example, 50% of 30 is 15.

Front

If there are 15 boys in a class and they represent 50% of the class, how do you find the total number of students?

Back

If 15 boys are 50%, then the total number of students is 15 / 0.5 = 30.

Front

How do you find the number of girls in a class if 75% are boys?

Back

If 75% are boys, then 25% are girls. To find the number of girls, calculate 25% of the total number of students.