download the Excel file called Equivalent Fraction Bars.
(Right click and use "Save target as" to save the file on your own
Set the numerator and denominator. The top bar will automatically
form into sections to show this fraction.
Turn on the middle bar to see a fraction equivalent to this but
with a denominator twice that of the top bar.
The bottom bar represents another fraction equivalent to the top
bar but with a denominator three times greater.