Arithmetic Grade Four

Lesson Seventy-one: Reducing Fractions

Here's another example of reducing a fraction. 

  Let's say we want to reduce:

        10
       ----
        15
To reduce we must:
  1. Find the Greatest Common Factor of the numerator and the demoninator.
  2. Divide both the numerator and the demoninator by the GCF.
Here's an example:

   Fraction:  10/15.
   Factors:
     10: {1, 2, 5, 10}.
     15: {1, 3, 5, 15}.
   GCF:  5.
   Divide the numerator and the denominator:
      10/5 = 2.
      15/5 = 3.
   Answer:  2/3.
Now you get to try a few.

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