Subtract 81/10 from 12/98
1st number: 12/98, 2nd number: 8 1/10
12/98 - 81/10 is -3909/490.
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,
12/98 = 12 × 5/98 × 5 = 60/490 - Likewise, for the 2nd fraction, since 10 × 49 = 490,
81/10 = 81 × 49/10 × 49 = 3969/490 - Subtract the two like fractions:
60/490 - 3969/490 = 60 - 3969/490 = -3909/490
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/98-81/10 12/98-81/20 36/98-81/10 12/98-81/30 60/98-81/10 12/98-81/50 84/98-81/10 12/98-81/70