Subtract 81/60 from 12/5
1st number: 2 2/5, 2nd number: 1 21/60
12/5 - 81/60 is 21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 5 × 12 = 60,
12/5 = 12 × 12/5 × 12 = 144/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Subtract the two like fractions:
144/60 - 81/60 = 144 - 81/60 = 63/60 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/5-81/60 12/10-81/60 36/5-81/60 12/15-81/60 60/5-81/60 12/25-81/60 84/5-81/60 12/35-81/60