Subtract 49/32 from 72/42, Solve 1 30/42

Subtract 49/32 from 72/42

1^st number: 1 30/42, 2^nd number: 1 17/32

72/42 - 49/32 is 41/224.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 42 × 16 = 672,
72/42 = 72 × 16/42 × 16 = 1152/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
49/32 = 49 × 21/32 × 21 = 1029/672
Subtract the two like fractions:
1152/672 - 1029/672 = 1152 - 1029/672 = 123/672
After reducing the fraction, the answer is 41/224

MathStep (Works offline)

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