Subtract 12/8 from 21/98
1st number: 21/98, 2nd number: 1 4/8
21/98 - 12/8 is -9/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 8 is 392
Next, find the equivalent fraction of both fractional numbers with denominator 392 - For the 1st fraction, since 98 × 4 = 392,
21/98 = 21 × 4/98 × 4 = 84/392 - Likewise, for the 2nd fraction, since 8 × 49 = 392,
12/8 = 12 × 49/8 × 49 = 588/392 - Subtract the two like fractions:
84/392 - 588/392 = 84 - 588/392 = -504/392 - After reducing the fraction, the answer is -9/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/98-12/8 21/98-24/8 21/98-12/16 63/98-12/8 21/98-36/8 21/98-12/24 21/98-60/8 21/98-12/40 21/98-84/8 21/98-12/56