Subtract 9/98 from 90/5, Solve 18 0/5

Subtract 9/98 from 90/5

1^st number: 18 0/5, 2^nd number: 9/98

90/5 - 9/98 is 1755/98.

Find the least common denominator or LCM of the two denominators:
LCM of 5 and 98 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 5 × 98 = 490,
90/5 = 90 × 98/5 × 98 = 8820/490
Likewise, for the 2nd fraction, since 98 × 5 = 490,
9/98 = 9 × 5/98 × 5 = 45/490
Subtract the two like fractions:
8820/490 - 45/490 = 8820 - 45/490 = 8775/490
After reducing the fraction, the answer is 1755/98
In mixed form: 1789/98

MathStep (Works offline)

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