Subtract 4/18 from 20/56
20/56 - 4/18 is 17/126.
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,
20/56 = 20 × 9/56 × 9 = 180/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
4/18 = 4 × 28/18 × 28 = 112/504 - Subtract the two like fractions:
180/504 - 112/504 = 180 - 112/504 = 68/504 - After reducing the fraction, the answer is 17/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/56-4/18 20/56-8/18 20/56-4/36 60/56-4/18 20/56-12/18 20/56-4/54 20/56-20/18 20/56-4/90 20/56-28/18