Along the top, choose Square or Circle.

How to Use

• Use the sliders to increase or decrease the number of columns and rows (for Squares) or the number of sectors (for Circles).
• Once the shape is divided as you want it, click on the sections to color them. Make the green and blue fractions equivalent to the red fraction.
• Click on the Check buttons to see if your fractions match. (Note that all fractions must use a different denominator. You will get a message that says, "Use a different denominator," if you make an equivalent fraction that does not use a different denominator.)
• Equivalent Fractions will automatically be added to the table.
  • To delete a row, use the Trash Can icon in the table.
  • To erase all recordings, use the Reset Table button.
• Use the New Fraction button to generate a new red fraction.
• The Build Your Own option can be used to create a red fraction of your choosing.

In the panel along the right side, choose the Build Your Own option.

Create a fraction whose denominator is a prime number.

• How many equivalent fractions can you create?

Is it possible to create a fraction such that no equivalent fractions could be created with this applet?

• Find at least one.
• Can you describe the fractions for which this is possible?