Subtract 21/8 from 49/28
1st number: 1 21/28, 2nd number: 2 5/8
49/28 - 21/8 is -7/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
49/28 = 49 × 2/28 × 2 = 98/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
21/8 = 21 × 7/8 × 7 = 147/56 - Subtract the two like fractions:
98/56 - 147/56 = 98 - 147/56 = -49/56 - After reducing the fraction, the answer is -7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/28-21/8 49/28-42/8 49/56-21/8 49/28-21/16 49/28-63/8 49/84-21/8 49/28-21/24 49/28-21/40 49/28-21/56