Subtract 20/10 from 81/98
1st number: 81/98, 2nd number: 2 0/10
81/98 - 20/10 is -115/98.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 10 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
81/98 = 81 × 5/98 × 5 = 405/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
20/10 = 20 × 49/10 × 49 = 980/490 - Subtract the two like fractions:
405/490 - 980/490 = 405 - 980/490 = -575/490 - After reducing the fraction, the answer is -115/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/98-40/10 81/98-60/10 81/98-20/30 81/98-20/50 81/98-20/70