Subtract 81/12 from 7/10
1st number: 7/10, 2nd number: 6 9/12
7/10 - 81/12 is -121/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 10 × 6 = 60,
7/10 = 7 × 6/10 × 6 = 42/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Subtract the two like fractions:
42/60 - 405/60 = 42 - 405/60 = -363/60 - After reducing the fraction, the answer is -121/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10-81/12 7/20-81/12 7/10-81/24 21/10-81/12 7/30-81/12 7/10-81/36 35/10-81/12 7/50-81/12 7/10-81/60 49/10-81/12 7/70-81/12 7/10-81/84