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 or to describe proportions.

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 is 25% of 200?

Back

50

Front

What is 20% of 75?

Back

15

Front

If 5% of a collection is 7 coins, how do you find the total number of coins?

Back

To find the total, divide the number of coins by the percentage in decimal form: Total = 7 / 0.05 = 140.

Front

What is 10% of 50?

Back

5

Front

How do you find the number of students who did not walk to school if 45% walked?

Back

Subtract the percentage of students who walked from 100% to find the percentage that rode the bus. Then multiply that percentage by the total number of students.

Front

If there are 640 students and 45% walked, how many rode the bus?

Back

352 students rode the bus.

Front

What does it mean if a problem states 'what is X% of Y'?

Back

It means you need to find the value that represents X percent of Y, which can be calculated by multiplying Y by X/100.

Front

How can you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 25% becomes 0.25.