Subtract 9/98 from 90/25, Solve 3 15/25

Subtract 9/98 from 90/25

1^st number: 3 15/25, 2^nd number: 9/98

90/25 - 9/98 is 1719/490.

Find the least common denominator or LCM of the two denominators:
LCM of 25 and 98 is 2450

Next, find the equivalent fraction of both fractional numbers with denominator 2450
For the 1st fraction, since 25 × 98 = 2450,
90/25 = 90 × 98/25 × 98 = 8820/2450
Likewise, for the 2nd fraction, since 98 × 25 = 2450,
9/98 = 9 × 25/98 × 25 = 225/2450
Subtract the two like fractions:
8820/2450 - 225/2450 = 8820 - 225/2450 = 8595/2450
After reducing the fraction, the answer is 1719/490
In mixed form: 3249/490

MathStep (Works offline)

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