Subtract 20/98 from 10/90
10/90 - 20/98 is -41/441.
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,
10/90 = 10 × 49/90 × 49 = 490/4410 - Likewise, for the 2nd fraction, since 98 × 45 = 4410,
20/98 = 20 × 45/98 × 45 = 900/4410 - Subtract the two like fractions:
490/4410 - 900/4410 = 490 - 900/4410 = -410/4410 - After reducing the fraction, the answer is -41/441
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90-20/98 10/90-40/98 30/90-20/98 10/90-60/98 50/90-20/98 70/90-20/98