Subtract 90/27 from 3/56, Solve 3/56

Subtract 90/27 from 3/56

1^st number: 3/56, 2^nd number: 3 9/27

3/56 - 90/27 is -551/168.

Find the least common denominator or LCM of the two denominators:
LCM of 56 and 27 is 1512

Next, find the equivalent fraction of both fractional numbers with denominator 1512
For the 1st fraction, since 56 × 27 = 1512,
3/56 = 3 × 27/56 × 27 = 81/1512
Likewise, for the 2nd fraction, since 27 × 56 = 1512,
90/27 = 90 × 56/27 × 56 = 5040/1512
Subtract the two like fractions:
81/1512 - 5040/1512 = 81 - 5040/1512 = -4959/1512
After reducing the fraction, the answer is -551/168

MathStep (Works offline)

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