Subtract 18/98 from 72/8, Solve 9 0/8

Subtract 18/98 from 72/8

1^st number: 9 0/8, 2^nd number: 18/98

72/8 - 18/98 is 432/49.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 98 is 392

Next, find the equivalent fraction of both fractional numbers with denominator 392
For the 1st fraction, since 8 × 49 = 392,
72/8 = 72 × 49/8 × 49 = 3528/392
Likewise, for the 2nd fraction, since 98 × 4 = 392,
18/98 = 18 × 4/98 × 4 = 72/392
Subtract the two like fractions:
3528/392 - 72/392 = 3528 - 72/392 = 3456/392
After reducing the fraction, the answer is 432/49
In mixed form: 840/49

MathStep (Works offline)

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