Subtract 12/8 from 81/7
1st number: 11 4/7, 2nd number: 1 4/8
81/7 - 12/8 is 141/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
81/7 = 81 × 8/7 × 8 = 648/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
12/8 = 12 × 7/8 × 7 = 84/56 - Subtract the two like fractions:
648/56 - 84/56 = 648 - 84/56 = 564/56 - After reducing the fraction, the answer is 141/14
- In mixed form: 101/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/7-24/8 81/14-12/8 81/7-12/16 81/7-36/8 81/21-12/8 81/7-12/24 81/7-60/8 81/35-12/8 81/7-12/40 81/7-84/8 81/49-12/8 81/7-12/56