Subtract 20/98 from 8/90
8/90 - 20/98 is -254/2205.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 98 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 90 × 49 = 4410,
8/90 = 8 × 49/90 × 49 = 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
Related: 16/90-20/98 8/90-40/98 24/90-20/98 8/90-60/98 40/90-20/98 56/90-20/98