Subtract 81/12 from 72/14
1st number: 5 2/14, 2nd number: 6 9/12
72/14 - 81/12 is -45/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
72/14 = 72 × 6/14 × 6 = 432/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
81/12 = 81 × 7/12 × 7 = 567/84 - Subtract the two like fractions:
432/84 - 567/84 = 432 - 567/84 = -135/84 - After reducing the fraction, the answer is -45/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/28-81/12 72/14-81/24 72/42-81/12 72/14-81/36 72/70-81/12 72/14-81/60 72/98-81/12 72/14-81/84