Subtract 63/27 from 42/4, Solve 10 2/4

Subtract 63/27 from 42/4

1^st number: 10 2/4, 2^nd number: 2 9/27

42/4 - 63/27 is 49/6.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108

Next, find the equivalent fraction of both fractional numbers with denominator 108
For the 1st fraction, since 4 × 27 = 108,
42/4 = 42 × 27/4 × 27 = 1134/108
Likewise, for the 2nd fraction, since 27 × 4 = 108,
63/27 = 63 × 4/27 × 4 = 252/108
Subtract the two like fractions:
1134/108 - 252/108 = 1134 - 252/108 = 882/108
After reducing the fraction, the answer is 49/6
In mixed form: 81/6

MathStep (Works offline)

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