Subtract 21/12 from 49/5, Solve 9 4/5

Subtract 21/12 from 49/5

1^st number: 9 4/5, 2^nd number: 1 9/12

49/5 - 21/12 is 161/20.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 12 is 60

Next, find the equivalent fraction of both fractional numbers with denominator 60
For the 1st fraction, since 5 × 12 = 60,
49/5 = 49 × 12/5 × 12 = 588/60
Likewise, for the 2nd fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60
Subtract the two like fractions:
588/60 - 105/60 = 588 - 105/60 = 483/60
After reducing the fraction, the answer is 161/20
In mixed form: 81/20

MathStep (Works offline)

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