Subtract 27/12 from 63/2, Solve 31 1/2

Subtract 27/12 from 63/2

1^st number: 31 1/2, 2^nd number: 2 3/12

63/2 - 27/12 is 117/4.

Find the least common denominator or LCM of the two denominators:
LCM of 2 and 12 is 12

Next, find the equivalent fraction of both fractional numbers with denominator 12
For the 1st fraction, since 2 × 6 = 12,
63/2 = 63 × 6/2 × 6 = 378/12
Likewise, for the 2nd fraction, since 12 × 1 = 12,
27/12 = 27 × 1/12 × 1 = 27/12
Subtract the two like fractions:
378/12 - 27/12 = 378 - 27/12 = 351/12
After reducing the fraction, the answer is 117/4
In mixed form: 291/4

MathStep (Works offline)

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