Subtract 42/40 from 1/56
1st number: 1/56, 2nd number: 1 2/40
1/56 - 42/40 is -289/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
1/56 = 1 × 5/56 × 5 = 5/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Subtract the two like fractions:
5/280 - 294/280 = 5 - 294/280 = -289/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/56-42/40 1/56-84/40 1/56-42/80 3/56-42/40 5/56-42/40 7/56-42/40