Subtract 56/18 from 18/15
1st number: 1 3/15, 2nd number: 3 2/18
18/15 - 56/18 is -86/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
18/15 = 18 × 6/15 × 6 = 108/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
56/18 = 56 × 5/18 × 5 = 280/90 - Subtract the two like fractions:
108/90 - 280/90 = 108 - 280/90 = -172/90 - After reducing the fraction, the answer is -86/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/15-56/18 18/30-56/18 18/15-56/36 54/15-56/18 18/45-56/18 18/15-56/54 90/15-56/18 18/75-56/18 18/15-56/90