Subtract 90/54 from 90/14, Solve 6 6/14

Subtract 90/54 from 90/14

1^st number: 6 6/14, 2^nd number: 1 36/54

90/14 - 90/54 is 100/21.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 14 × 27 = 378,
90/14 = 90 × 27/14 × 27 = 2430/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
90/54 = 90 × 7/54 × 7 = 630/378
Subtract the two like fractions:
2430/378 - 630/378 = 2430 - 630/378 = 1800/378
After reducing the fraction, the answer is 100/21
In mixed form: 416/21

MathStep (Works offline)

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