Subtract 30/70 from 90/98, Solve 90/98

Subtract 30/70 from 90/98

90/98 - 30/70 is 24/49.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490

Next, find the equivalent fraction of both fractional numbers with denominator 490
For the 1st fraction, since 98 × 5 = 490,
90/98 = 90 × 5/98 × 5 = 450/490
Likewise, for the 2nd fraction, since 70 × 7 = 490,
30/70 = 30 × 7/70 × 7 = 210/490
Subtract the two like fractions:
450/490 - 210/490 = 450 - 210/490 = 240/490
After reducing the fraction, the answer is 24/49

MathStep (Works offline)

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