Subtract 6/90 from 7/98, Solve 7/98

Subtract 6/90 from 7/98

7/98 - 6/90 is 1/210.

Find the least common denominator or LCM of the two denominators:
LCM of 98 and 90 is 4410

Next, find the equivalent fraction of both fractional numbers with denominator 4410
For the 1st fraction, since 98 × 45 = 4410,
7/98 = 7 × 45/98 × 45 = 315/4410
Likewise, for the 2nd fraction, since 90 × 49 = 4410,
6/90 = 6 × 49/90 × 49 = 294/4410
Subtract the two like fractions:
315/4410 - 294/4410 = 315 - 294/4410 = 21/4410
After reducing the fraction, the answer is 1/210

MathStep (Works offline)

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