Subtract 27/12 from 20/15
1st number: 1 5/15, 2nd number: 2 3/12
20/15 - 27/12 is -11/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
20/15 = 20 × 4/15 × 4 = 80/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
27/12 = 27 × 5/12 × 5 = 135/60 - Subtract the two like fractions:
80/60 - 135/60 = 80 - 135/60 = -55/60 - After reducing the fraction, the answer is -11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-27/12 20/15-54/12 20/30-27/12 20/15-27/24 60/15-27/12 20/15-81/12 20/45-27/12 20/15-27/36 20/75-27/12 20/15-27/60 20/15-27/84