Subtract 21/18 from 5/56
1st number: 5/56, 2nd number: 1 3/18
5/56 - 21/18 is -181/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 18 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
5/56 = 5 × 9/56 × 9 = 45/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
21/18 = 21 × 28/18 × 28 = 588/504 - Subtract the two like fractions:
45/504 - 588/504 = 45 - 588/504 = -543/504 - After reducing the fraction, the answer is -181/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/56-21/18 5/56-42/18 5/56-21/36 15/56-21/18 5/56-63/18 5/56-21/54 25/56-21/18 5/56-21/90 35/56-21/18