Subtract 3/28 from 90/54, Solve 1 36/54

Subtract 3/28 from 90/54

1^st number: 1 36/54, 2^nd number: 3/28

90/54 - 3/28 is 131/84.

Find the least common denominator or LCM of the two denominators:
LCM of 54 and 28 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 54 × 14 = 756,
90/54 = 90 × 14/54 × 14 = 1260/756
Likewise, for the 2nd fraction, since 28 × 27 = 756,
3/28 = 3 × 27/28 × 27 = 81/756
Subtract the two like fractions:
1260/756 - 81/756 = 1260 - 81/756 = 1179/756
After reducing the fraction, the answer is 131/84
In mixed form: 147/84

MathStep (Works offline)

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