Subtract 81/12 from 8/5
1st number: 1 3/5, 2nd number: 6 9/12
8/5 - 81/12 is -103/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 5 × 12 = 60,
8/5 = 8 × 12/5 × 12 = 96/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
81/12 = 81 × 5/12 × 5 = 405/60 - Subtract the two like fractions:
96/60 - 405/60 = 96 - 405/60 = -309/60 - After reducing the fraction, the answer is -103/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/5-81/12 8/10-81/12 8/5-81/24 24/5-81/12 8/15-81/12 8/5-81/36 40/5-81/12 8/25-81/12 8/5-81/60 56/5-81/12 8/35-81/12 8/5-81/84