Subtract 49/36 from 21/56
1st number: 21/56, 2nd number: 1 13/36
21/56 - 49/36 is -71/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 36 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
21/56 = 21 × 9/56 × 9 = 189/504 - Likewise, for the 2nd fraction, since 36 × 14 = 504,
49/36 = 49 × 14/36 × 14 = 686/504 - Subtract the two like fractions:
189/504 - 686/504 = 189 - 686/504 = -497/504 - After reducing the fraction, the answer is -71/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/56-49/36 21/56-98/36 21/56-49/72 63/56-49/36