Subtract 21/12 from 8/98, Solve 8/98

Subtract 21/12 from 8/98

1^st number: 8/98, 2^nd number: 1 9/12

8/98 - 21/12 is -327/196.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 12 is 588

Next, find the equivalent fraction of both fractional numbers with denominator 588
For the 1st fraction, since 98 × 6 = 588,
8/98 = 8 × 6/98 × 6 = 48/588
Likewise, for the 2nd fraction, since 12 × 49 = 588,
21/12 = 21 × 49/12 × 49 = 1029/588
Subtract the two like fractions:
48/588 - 1029/588 = 48 - 1029/588 = -981/588
After reducing the fraction, the answer is -327/196

MathStep (Works offline)

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