Subtract 10/63 from 81/72
1st number: 1 9/72, 2nd number: 10/63
81/72 - 10/63 is 487/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 63 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
81/72 = 81 × 7/72 × 7 = 567/504 - Likewise, for the 2nd fraction, since 63 × 8 = 504,
10/63 = 10 × 8/63 × 8 = 80/504 - Subtract the two like fractions:
567/504 - 80/504 = 567 - 80/504 = 487/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/72-20/63 81/72-30/63 81/72-50/63 81/72-70/63