Subtract 80/98 from 60/81, Solve 60/81

Subtract 80/98 from 60/81

60/81 - 80/98 is -100/1323.

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 98 is 7938

Next, find the equivalent fraction of both fractional numbers with denominator 7938
For the 1st fraction, since 81 × 98 = 7938,
60/81 = 60 × 98/81 × 98 = 5880/7938
Likewise, for the 2nd fraction, since 98 × 81 = 7938,
80/98 = 80 × 81/98 × 81 = 6480/7938
Subtract the two like fractions:
5880/7938 - 6480/7938 = 5880 - 6480/7938 = -600/7938
After reducing the fraction, the answer is -100/1323

MathStep (Works offline)

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