how do you reduce a fraction

Question

Dividde both the numerator and denominator by the largest common integer possible. Then cancel them out.

For example, in the fraction 15/25, the largest integer that is divisible evenly into both numerator and denominator is 5. So you would write
15/25 = (5*3)/(5*5) = 3/5
(The 5's cancel out)

thanks drwls