Subtract 18/72 from 56/63
56/63 - 18/72 is 23/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
56/63 = 56 × 8/63 × 8 = 448/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Subtract the two like fractions:
448/504 - 126/504 = 448 - 126/504 = 322/504 - After reducing the fraction, the answer is 23/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/63-36/72 56/63-54/72 56/63-90/72