Subtract 6/54 from 90/75, Solve 1 15/75

Subtract 6/54 from 90/75

1^st number: 1 15/75, 2^nd number: 6/54

90/75 - 6/54 is 49/45.

Find the least common denominator or LCM of the two denominators:
LCM of 75 and 54 is 1350

Next, find the equivalent fraction of both fractional numbers with denominator 1350
For the 1st fraction, since 75 × 18 = 1350,
90/75 = 90 × 18/75 × 18 = 1620/1350
Likewise, for the 2nd fraction, since 54 × 25 = 1350,
6/54 = 6 × 25/54 × 25 = 150/1350
Subtract the two like fractions:
1620/1350 - 150/1350 = 1620 - 150/1350 = 1470/1350
After reducing the fraction, the answer is 49/45
In mixed form: 14/45

MathStep (Works offline)

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