Subtract 27/15 from 20/36
1st number: 20/36, 2nd number: 1 12/15
20/36 - 27/15 is -56/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 15 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 36 × 5 = 180,
20/36 = 20 × 5/36 × 5 = 100/180 - Likewise, for the 2nd fraction, since 15 × 12 = 180,
27/15 = 27 × 12/15 × 12 = 324/180 - Subtract the two like fractions:
100/180 - 324/180 = 100 - 324/180 = -224/180 - After reducing the fraction, the answer is -56/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36-27/15 20/36-54/15 20/72-27/15 20/36-27/30 60/36-27/15 20/36-81/15 20/36-27/45 20/36-27/75