Fractions For Dummies
Explore Book
Subscribe on Perlego
Fractions For Dummies
Explore Book
Subscribe on Perlego

Percents are commonly used in business to represent partial amounts of money. They're also used in statistics to indicate a portion of a data set. As you practice basic math problems, you'll discover that percents are closely related to decimals, which means that they're easier to work with than fractions.

  • To change a percent to a decimal, move the decimal point two places to the left and drop the percent sign.

  • To change a decimal to a percent, move the decimal point two places to the right and attach a percent sign.

  • To change a percent to a fraction, drop the percent sign and put the number of the percent in the numerator of a fraction with a denominator of 100. If necessary, reduce the fraction.

  • To change a fraction to a percent, first change the fraction to a decimal by dividing. Then change the decimal to a percent by moving the decimal point two places to the right and attaching a percent sign.

  • Calculate simple percents by dividing. For example, to find 50% of a number, divide by 2; to find 25%, divide by 4; to find 20%, divide by 5; and so forth.

  • You can calculate some percents by reversing the numbers. For example 14% of 50 is the same as 50% of 14, which equals 7.

About This Article

This article is from the book: 

About the book author:

Mark Zegarelli is a math tutor and author of several books, including Basic Math & Pre-Algebra For Dummies.