Subtract 81/8 from 7/63
1st number: 7/63, 2nd number: 10 1/8
7/63 - 81/8 is -721/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 8 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 63 × 8 = 504,
7/63 = 7 × 8/63 × 8 = 56/504 - Likewise, for the 2nd fraction, since 8 × 63 = 504,
81/8 = 81 × 63/8 × 63 = 5103/504 - Subtract the two like fractions:
56/504 - 5103/504 = 56 - 5103/504 = -5047/504 - After reducing the fraction, the answer is -721/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-81/8 7/63-81/16 21/63-81/8 7/63-81/24 35/63-81/8 7/63-81/40 49/63-81/8 7/63-81/56