Subtract 75/90 from 20/98
20/98 - 75/90 is -185/294.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 98 × 45 = 4410,
20/98 = 20 × 45/98 × 45 = 900/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
75/90 = 75 × 49/90 × 49 = 3675/4410 - Subtract the two like fractions:
900/4410 - 3675/4410 = 900 - 3675/4410 = -2775/4410 - After reducing the fraction, the answer is -185/294
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/98-75/90 60/98-75/90