Subtract 49/32 from 6/21, Solve 6/21

Subtract 49/32 from 6/21

1^st number: 6/21, 2^nd number: 1 17/32

6/21 - 49/32 is -279/224.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 21 × 32 = 672,
6/21 = 6 × 32/21 × 32 = 192/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
49/32 = 49 × 21/32 × 21 = 1029/672
Subtract the two like fractions:
192/672 - 1029/672 = 192 - 1029/672 = -837/672
After reducing the fraction, the answer is -279/224

MathStep (Works offline)

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