Review for Chapter 4 Test Percents

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 convert a percent to a decimal?

Back

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

Front

What is 40% of 230?

Back

92

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over 1 and multiply the numerator and denominator by 10 for every digit after the decimal point. For example, 0.7 becomes 7/10.

Front

What is 34% of 150?

Back

51

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 8 is of 20, calculate (8/20) * 100 = 40%.

Front

What is 5% as a decimal?

Back

0.05

Front

How do you calculate the percentage increase?

Back

To calculate the percentage increase, subtract the original number from the new number, divide by the original number, and multiply by 100.

Front

What is the formula for finding the whole when given a percent and a part?

Back

The formula is: Whole = Part / (Percent / 100). For example, if 34% of a number is 51, the whole is 51 / 0.34 = 150.

Front

What is 20% of 50?

Back

10