Subtract 3/54 from 8/7, Solve 1 1/7

Subtract 3/54 from 8/7

1^st number: 1 1/7, 2^nd number: 3/54

8/7 - 3/54 is 137/126.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 7 × 54 = 378,
8/7 = 8 × 54/7 × 54 = 432/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
3/54 = 3 × 7/54 × 7 = 21/378
Subtract the two like fractions:
432/378 - 21/378 = 432 - 21/378 = 411/378
After reducing the fraction, the answer is 137/126
In mixed form: 111/126

MathStep (Works offline)

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