Subtract 81/30 from 12/6
1st number: 2 0/6, 2nd number: 2 21/30
12/6 - 81/30 is -7/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 6 × 5 = 30,
12/6 = 12 × 5/6 × 5 = 60/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
81/30 = 81 × 1/30 × 1 = 81/30 - Subtract the two like fractions:
60/30 - 81/30 = 60 - 81/30 = -21/30 - After reducing the fraction, the answer is -7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/6-81/30 12/6-81/60 36/6-81/30 12/18-81/30 12/6-81/90 60/6-81/30 12/30-81/30 84/6-81/30 12/42-81/30