Subtract 25/56 from 1/42
1/42 - 25/56 is -71/168.
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,
25/56 = 25 × 3/56 × 3 = 75/168 - Subtract the two like fractions:
4/168 - 75/168 = 4 - 75/168 = -71/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/42-25/56 1/42-50/56 1/84-25/56 3/42-25/56 1/42-75/56 5/42-25/56 7/42-25/56