Subtract 10/56 from 5/42
5/42 - 10/56 is -5/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
5/42 = 5 × 4/42 × 4 = 20/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
10/56 = 10 × 3/56 × 3 = 30/168 - Subtract the two like fractions:
20/168 - 30/168 = 20 - 30/168 = -10/168 - After reducing the fraction, the answer is -5/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42-10/56 5/42-20/56 5/84-10/56 15/42-10/56 5/42-30/56 25/42-10/56 5/42-50/56 35/42-10/56 5/42-70/56