Subtract 9/14 from 90/5, Solve 18 0/5

Subtract 9/14 from 90/5

1^st number: 18 0/5, 2^nd number: 9/14

90/5 - 9/14 is 243/14.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 14 is 70

Next, find the equivalent fraction of both fractional numbers with denominator 70
For the 1st fraction, since 5 × 14 = 70,
90/5 = 90 × 14/5 × 14 = 1260/70
Likewise, for the 2nd fraction, since 14 × 5 = 70,
9/14 = 9 × 5/14 × 5 = 45/70
Subtract the two like fractions:
1260/70 - 45/70 = 1260 - 45/70 = 1215/70
After reducing the fraction, the answer is 243/14
In mixed form: 175/14

MathStep (Works offline)

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