Subtract 8/54 from 40/7, Solve 5 5/7

Subtract 8/54 from 40/7

1^st number: 5 5/7, 2^nd number: 8/54

40/7 - 8/54 is 1052/189.

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,
40/7 = 40 × 54/7 × 54 = 2160/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
8/54 = 8 × 7/54 × 7 = 56/378
Subtract the two like fractions:
2160/378 - 56/378 = 2160 - 56/378 = 2104/378
After reducing the fraction, the answer is 1052/189
In mixed form: 5107/189

MathStep (Works offline)

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