Basic Math & Pre-Algebra For Dummies
Book image
Explore Book Buy On Amazon
Fractions, decimals, and percents are the three most common ways to give a mathematical description of parts of a whole object. Fractions are common in baking and carpentry when you're using English measurement units (such as cups, gallons, feet, and inches). Decimals are used with dollars and cents, the metric system, and in scientific notation. Percents are used in business when figuring profit and interest rates, as well as in statistics.

Use the following table as a handy guide when you need to make basic conversions among the three.

Fraction Decimal Percent
1/100 0.01 1%
1/20 0.05 5%
1/10 0.1 10%
1/5 0.2 20%
1/4 0.25 25%
3/10 0.3 30%
2/5 0.4 40%
1/2 0.5 50%
3/5 0.6 60%
7/10 0.7 70%
3/4 0.75 75%
4/5 0.8 80%
9/10 0.9 90%
1 1.0 100%
2 2.0 200%
10 10.0 1,000%

About This Article

This article is from the book:

About the book author:

Mark Zegarelli earned degrees in mathematics and English from Rutgers University. He is the founder of SimpleStep Learning, an online educational platform that teaches courses in basic concepts in ten minutes or less, keeping students engaged and learning in every moment. Mark is also author of several other successful For Dummies books.

This article can be found in the category: