In this video we will simplify (reduce) the fraction 4/15 into its simplest form. The key to simplifying fractions is to find a number that goes into both the numerator and denominator.

The number 1 will divide evenly into both 4 and 15.

We can list all of the factors that divide evenly into 4 and 15. When we do so we see that 1 is the highest common factor for both numbers.

If we divide 4 by 1 we get 4.
If we divide 15 by 1 we get 15.

This means that we can simplify 4/15 to 4/15. The fractions are equivalent. If you check on a calculator you will find that they have the same decimal value. So we haven't changed the quantity, just the way the fraction is expressed.

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