Subtract 7/18 from 7/56
7/56 - 7/18 is -19/72.
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,
7/56 = 7 × 9/56 × 9 = 63/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
7/18 = 7 × 28/18 × 28 = 196/504 - Subtract the two like fractions:
63/504 - 196/504 = 63 - 196/504 = -133/504 - After reducing the fraction, the answer is -19/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/56-7/18 7/56-14/18 7/56-7/36 21/56-7/18 7/56-21/18 7/56-7/54 35/56-7/18 7/56-35/18 7/56-7/90 49/56-7/18 7/56-49/18