Subtract 18/20 from 4/56
4/56 - 18/20 is -29/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
4/56 = 4 × 5/56 × 5 = 20/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
18/20 = 18 × 14/20 × 14 = 252/280 - Subtract the two like fractions:
20/280 - 252/280 = 20 - 252/280 = -232/280 - After reducing the fraction, the answer is -29/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/56-18/20 4/56-36/20 4/56-18/40 12/56-18/20 4/56-54/20 4/56-18/60 20/56-18/20 4/56-90/20 28/56-18/20