Subtract 63/56 from 1/42
1st number: 1/42, 2nd number: 1 7/56
1/42 - 63/56 is -185/168.
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,
1/42 = 1 × 4/42 × 4 = 4/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
63/56 = 63 × 3/56 × 3 = 189/168 - Subtract the two like fractions:
4/168 - 189/168 = 4 - 189/168 = -185/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-63/56 1/84-63/56 3/42-63/56 5/42-63/56 7/42-63/56