Subtract 20/56 from 5/15
5/15 - 20/56 is -1/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
5/15 = 5 × 56/15 × 56 = 280/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
20/56 = 20 × 15/56 × 15 = 300/840 - Subtract the two like fractions:
280/840 - 300/840 = 280 - 300/840 = -20/840 - After reducing the fraction, the answer is -1/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15-20/56 5/15-40/56 5/30-20/56 5/15-60/56 5/45-20/56 25/15-20/56 5/75-20/56 35/15-20/56