Subtract 18/32 from 18/70, Solve 18/70

Subtract 18/32 from 18/70

18/70 - 18/32 is -171/560.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 32 is 1120

Next, find the equivalent fraction of both fractional numbers with denominator 1120
For the 1st fraction, since 70 × 16 = 1120,
18/70 = 18 × 16/70 × 16 = 288/1120
Likewise, for the 2nd fraction, since 32 × 35 = 1120,
18/32 = 18 × 35/32 × 35 = 630/1120
Subtract the two like fractions:
288/1120 - 630/1120 = 288 - 630/1120 = -342/1120
After reducing the fraction, the answer is -171/560

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad