Subtract 18/56 from 6/20
6/20 - 18/56 is -3/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
6/20 = 6 × 14/20 × 14 = 84/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
18/56 = 18 × 5/56 × 5 = 90/280 - Subtract the two like fractions:
84/280 - 90/280 = 84 - 90/280 = -6/280 - After reducing the fraction, the answer is -3/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20-18/56 6/20-36/56 6/40-18/56 18/20-18/56 6/20-54/56 6/60-18/56 30/20-18/56 6/20-90/56 42/20-18/56