This excellent math resource explains and defines the meaning of percent. Multiplying and dividing by a power of 10 is incorporated as a preview to understanding scientific notation.

This tutorial helps you take a number in standard form and write it in scientific notation with several examples.

Converting percents to and from decimals and fractions is demonstrated in detailed examples. Once the concept is understood, you can use it to solve equations that contain percents.

Dealing with very small or very large numbers can be tedious. Scientific notation helps simplify the process and this tutorial teaches students scientific notation with multiple examples, practice problems, calculator tips, and two...

Practice changing various fractions to repeating decimals. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told the correct answer. See how...

Practice writing percents as fractions and fractions as percents. For example, convert 30% to a simplified fraction. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.