Subtract 81/70 from 10/12
1st number: 10/12, 2nd number: 1 11/70
10/12 - 81/70 is -34/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
10/12 = 10 × 35/12 × 35 = 350/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
81/70 = 81 × 6/70 × 6 = 486/420 - Subtract the two like fractions:
350/420 - 486/420 = 350 - 486/420 = -136/420 - After reducing the fraction, the answer is -34/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/12-81/70 10/24-81/70 30/12-81/70 10/36-81/70 50/12-81/70 10/60-81/70 70/12-81/70 10/84-81/70