Subtract 70/16 from 56/18, Solve 3 2/18

Subtract 70/16 from 56/18

1^st number: 3 2/18, 2^nd number: 4 6/16

56/18 - 70/16 is -91/72.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 16 is 144

Next, find the equivalent fraction of both fractional numbers with denominator 144
For the 1st fraction, since 18 × 8 = 144,
56/18 = 56 × 8/18 × 8 = 448/144
Likewise, for the 2nd fraction, since 16 × 9 = 144,
70/16 = 70 × 9/16 × 9 = 630/144
Subtract the two like fractions:
448/144 - 630/144 = 448 - 630/144 = -182/144
After reducing the fraction, the answer is -91/72

MathStep (Works offline)

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