Subtract 18/8 from 9/54, Solve 9/54

Subtract 18/8 from 9/54

1^st number: 9/54, 2^nd number: 2 2/8

9/54 - 18/8 is -25/12.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 8 is 216

Next, find the equivalent fraction of both fractional numbers with denominator 216
For the 1st fraction, since 54 × 4 = 216,
9/54 = 9 × 4/54 × 4 = 36/216
Likewise, for the 2nd fraction, since 8 × 27 = 216,
18/8 = 18 × 27/8 × 27 = 486/216
Subtract the two like fractions:
36/216 - 486/216 = 36 - 486/216 = -450/216
After reducing the fraction, the answer is -25/12

MathStep (Works offline)

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