AAA Math
Aaa Math: All About Percents and Ratios
This AAA Math tutorial covers calculating percents, relationships of percents to fractions and decimals, and uses of percents.
National Council of Teachers of Mathematics
Ntcm: Math Challenge: Perplexing Percentages
Test your bargin shopping skills by figuring out which discount offers the greatest savings. A one page activity from the NCTM Math Challenges for Families series that focuses on understanding and calculating percentages. Connections...
National Council of Teachers of Mathematics
The Math Forum: Calculating Sales Tax
Dr. Math is asked about calculating sales tax. A quick and easy to follow explanation of how it works using fractions, decimals, ratio, and percent.
AAA Math
Aaa Math: Converting a Percent to a Decimal
This personal page explains how to change a percent to a decimal, then offers practice and games to polish this skill.