Subtract 18/63 from 7/56
7/56 - 18/63 is -9/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 63 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 63 × 8 = 504,
18/63 = 18 × 8/63 × 8 = 144/504 - Subtract the two like fractions:
63/504 - 144/504 = 63 - 144/504 = -81/504 - After reducing the fraction, the answer is -9/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/56-18/63 7/56-36/63 21/56-18/63 7/56-54/63 35/56-18/63 7/56-90/63 49/56-18/63