Percentages Fractions and Decimals Grid
This interactive activity explores the representation of fractions, decimals and percentages using either a square or circle divided into equal parts. When the activity is launched, a 100 square grid is shown. Click the random button to create a grid of different colors. The squares change so they are either orange or white. You can change the number of colors using the color number control, change it to 5 and press random again and there will now be 5 different colors in the grid. You can arrange the grid automatically by clicking arrange button, to reset the grid back to white click the trash button
To select your own fraction simply select one of the colors and click and drag your mouse over the either the grid or the circle.
The initial set up is ideal for explaining percentages since there are 100 squares, but this can be changed by using the divisions selection. You can also change from the square to a circle by clicking the shape toggle control
Hiding or Showing the values
On the right side of the screen our colored rectangles with ? labels. Click one of these to turn the rectangle over to display its decimal,percentage or fraction value. To change a whole column click one of the buttons above to toggle hide or show. Note values on display automatically change as the grid or circle is changed.
The fraction values by default are simplified, to change this click the cancel fraction toggle control.