Subtract 5/7 from 81/15
1st number: 5 6/15, 2nd number: 5/7
81/15 - 5/7 is 164/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
81/15 = 81 × 7/15 × 7 = 567/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
5/7 = 5 × 15/7 × 15 = 75/105 - Subtract the two like fractions:
567/105 - 75/105 = 567 - 75/105 = 492/105 - After reducing the fraction, the answer is 164/35
- In mixed form: 424/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/15-10/7 81/30-5/7 81/15-5/14 81/15-15/7 81/45-5/7 81/15-5/21 81/15-25/7 81/75-5/7 81/15-5/35 81/15-35/7 81/15-5/49