Subtract 18/84 from 5/56
5/56 - 18/84 is -1/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 84 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
5/56 = 5 × 3/56 × 3 = 15/168 - Likewise, for the 2nd fraction, since 84 × 2 = 168,
18/84 = 18 × 2/84 × 2 = 36/168 - Subtract the two like fractions:
15/168 - 36/168 = 15 - 36/168 = -21/168 - After reducing the fraction, the answer is -1/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/56-18/84 5/56-36/84 15/56-18/84 5/56-54/84 25/56-18/84 5/56-90/84 35/56-18/84