Subtract 18/28 from 12/56
12/56 - 18/28 is -3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 28 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 56 × 1 = 56,
12/56 = 12 × 1/56 × 1 = 12/56 - Likewise, for the 2nd fraction, since 28 × 2 = 56,
18/28 = 18 × 2/28 × 2 = 36/56 - Subtract the two like fractions:
12/56 - 36/56 = 12 - 36/56 = -24/56 - After reducing the fraction, the answer is -3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/56-18/28 12/56-36/28 12/56-18/56 36/56-18/28 12/56-54/28 12/56-18/84 60/56-18/28 12/56-90/28 84/56-18/28