Subtract 20/90 from 84/98
84/98 - 20/90 is 40/63.
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,
84/98 = 84 × 45/98 × 45 = 3780/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
20/90 = 20 × 49/90 × 49 = 980/4410 - Subtract the two like fractions:
3780/4410 - 980/4410 = 3780 - 980/4410 = 2800/4410 - After reducing the fraction, the answer is 40/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/98-40/90 84/98-60/90