Subtract 18/56 from 7/28
7/28 - 18/56 is -1/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
7/28 = 7 × 2/28 × 2 = 14/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
18/56 = 18 × 1/56 × 1 = 18/56 - Subtract the two like fractions:
14/56 - 18/56 = 14 - 18/56 = -4/56 - After reducing the fraction, the answer is -1/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-18/56 7/28-36/56 7/56-18/56 21/28-18/56 7/28-54/56 7/84-18/56 35/28-18/56 7/28-90/56 49/28-18/56