Subtract 20/56 from 5/18
5/18 - 20/56 is -5/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 18 × 28 = 504,
5/18 = 5 × 28/18 × 28 = 140/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
20/56 = 20 × 9/56 × 9 = 180/504 - Subtract the two like fractions:
140/504 - 180/504 = 140 - 180/504 = -40/504 - After reducing the fraction, the answer is -5/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-20/56 5/18-40/56 5/36-20/56 15/18-20/56 5/18-60/56 5/54-20/56 25/18-20/56 5/90-20/56 35/18-20/56