Fraction and Percent Tool
3rd to 5th, 6th to 8th, High School
Note that a revised version of this tool, Fraction Models, uses length, area, region and set models to represent fractions, decimals, and percents, though the denominators in that tool are limited to a maximum of 25.
There are three models to choose from:
Toggle the "Show Sections" check box to show/hide division lines in the circle and rectangle mode.