As the only prime factor of denominator is 2 , in fact there are three twos ( 2 × 2 × 2 ) we can can convert the fraction 7 8 by multiplying numerator and denominator by 5 × 5 × 5 . Hence, 7 8 = 7 × 5 × 5 × 5 8 × 5 × 5 × 5 = 875 1000 = 0.875
(This is always possible if only prime factors of denominator are 2 's and 5 's - just multiply by as many 5 's and 2 's).
