Subtract 56/49 from 90/18, Solve 5 0/18

Subtract 56/49 from 90/18

1^st number: 5 0/18, 2^nd number: 1 7/49

90/18 - 56/49 is 27/7.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 49 is 882

Next, find the equivalent fraction of both fractional numbers with denominator 882
For the 1st fraction, since 18 × 49 = 882,
90/18 = 90 × 49/18 × 49 = 4410/882
Likewise, for the 2nd fraction, since 49 × 18 = 882,
56/49 = 56 × 18/49 × 18 = 1008/882
Subtract the two like fractions:
4410/882 - 1008/882 = 4410 - 1008/882 = 3402/882
After reducing the fraction, the answer is 27/7
In mixed form: 36/7

MathStep (Works offline)

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