Subtract 10/98 from 40/42, Solve 40/42

Subtract 10/98 from 40/42

40/42 - 10/98 is 125/147.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 98 is 294

Next, find the equivalent fraction of both fractional numbers with denominator 294
For the 1st fraction, since 42 × 7 = 294,
40/42 = 40 × 7/42 × 7 = 280/294
Likewise, for the 2nd fraction, since 98 × 3 = 294,
10/98 = 10 × 3/98 × 3 = 30/294
Subtract the two like fractions:
280/294 - 30/294 = 280 - 30/294 = 250/294
After reducing the fraction, the answer is 125/147

MathStep (Works offline)

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