Subtract 21/98 from 63/21, Solve 3 0/21

Subtract 21/98 from 63/21

1^st number: 3 0/21, 2^nd number: 21/98

63/21 - 21/98 is 39/14.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 98 is 294

Next, find the equivalent fraction of both fractional numbers with denominator 294
For the 1st fraction, since 21 × 14 = 294,
63/21 = 63 × 14/21 × 14 = 882/294
Likewise, for the 2nd fraction, since 98 × 3 = 294,
21/98 = 21 × 3/98 × 3 = 63/294
Subtract the two like fractions:
882/294 - 63/294 = 882 - 63/294 = 819/294
After reducing the fraction, the answer is 39/14
In mixed form: 211/14

MathStep (Works offline)

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