Subtract 8/63 from 81/7
1st number: 11 4/7, 2nd number: 8/63
81/7 - 8/63 is 103/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
81/7 = 81 × 9/7 × 9 = 729/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
8/63 = 8 × 1/63 × 1 = 8/63 - Subtract the two like fractions:
729/63 - 8/63 = 729 - 8/63 = 721/63 - After reducing the fraction, the answer is 103/9
- In mixed form: 114/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-16/63 81/14-8/63 81/7-24/63 81/21-8/63 81/7-40/63 81/35-8/63 81/7-56/63 81/49-8/63