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Multiplying fractions--the area model

This is a Java Applet created using GeoGebra from - it looks like you don't have Java installed, please go to

Move the points on the sliders to change the numerators and denominators of the first (N1/D1) and second (N2/D2) factors.

The yellow square is the unit of area (one square unit).

The area of the green rectangle is the product of the fractions.

For more control over size and views, zoom in or out as necessary: pull down the small triangle on the last button on the right to get the menu. Go back to the selection arrow (left button) to adjust sliders again.

Susan Addington, Sept. 1, 2006, Created with GeoGebra


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Last updated November 30, 2011

Copyright 2009-11 David Dennis and Susan Addington. All rights reserved.