Subtract 32/21 from 8/54, Solve 8/54

Subtract 32/21 from 8/54

1^st number: 8/54, 2^nd number: 1 11/21

8/54 - 32/21 is -260/189.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
8/54 = 8 × 7/54 × 7 = 56/378
Likewise, for the 2nd fraction, since 21 × 18 = 378,
32/21 = 32 × 18/21 × 18 = 576/378
Subtract the two like fractions:
56/378 - 576/378 = 56 - 576/378 = -520/378
After reducing the fraction, the answer is -260/189

MathStep (Works offline)

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