Subtract 20/98 from 4/45, Solve 4/45

Subtract 20/98 from 4/45

4/45 - 20/98 is -254/2205.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 98 is 4410

Next, find the equivalent fraction of both fractional numbers with denominator 4410
For the 1st fraction, since 45 × 98 = 4410,
4/45 = 4 × 98/45 × 98 = 392/4410
Likewise, for the 2nd fraction, since 98 × 45 = 4410,
20/98 = 20 × 45/98 × 45 = 900/4410
Subtract the two like fractions:
392/4410 - 900/4410 = 392 - 900/4410 = -508/4410
After reducing the fraction, the answer is -254/2205

MathStep (Works offline)

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