Subtract 15/18 from 4/56
4/56 - 15/18 is -16/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 18 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
4/56 = 4 × 9/56 × 9 = 36/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
15/18 = 15 × 28/18 × 28 = 420/504 - Subtract the two like fractions:
36/504 - 420/504 = 36 - 420/504 = -384/504 - After reducing the fraction, the answer is -16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/56-15/18 4/56-30/18 4/56-15/36 12/56-15/18 4/56-45/18 4/56-15/54 20/56-15/18 4/56-75/18 4/56-15/90 28/56-15/18