Subtract 7/56 from 8/42
8/42 - 7/56 is 11/168.
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,
8/42 = 8 × 4/42 × 4 = 32/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
7/56 = 7 × 3/56 × 3 = 21/168 - Subtract the two like fractions:
32/168 - 21/168 = 32 - 21/168 = 11/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-7/56 8/42-14/56 8/84-7/56 24/42-7/56 8/42-21/56 40/42-7/56 8/42-35/56 56/42-7/56 8/42-49/56