Subtract 10/98 from 18/40, Solve 18/40

Subtract 10/98 from 18/40

18/40 - 10/98 is 341/980.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 98 is 1960

Next, find the equivalent fraction of both fractional numbers with denominator 1960
For the 1st fraction, since 40 × 49 = 1960,
18/40 = 18 × 49/40 × 49 = 882/1960
Likewise, for the 2nd fraction, since 98 × 20 = 1960,
10/98 = 10 × 20/98 × 20 = 200/1960
Subtract the two like fractions:
882/1960 - 200/1960 = 882 - 200/1960 = 682/1960
After reducing the fraction, the answer is 341/980

MathStep (Works offline)

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