Subtract 56/15 from 27/42
1st number: 27/42, 2nd number: 3 11/15
27/42 - 56/15 is -649/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
56/15 = 56 × 14/15 × 14 = 784/210 - Subtract the two like fractions:
135/210 - 784/210 = 135 - 784/210 = -649/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42-56/15 27/84-56/15 27/42-56/30 81/42-56/15 27/42-56/45 27/42-56/75