Subtract 81/56 from 42/28
1st number: 1 14/28, 2nd number: 1 25/56
42/28 - 81/56 is 3/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 56 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 28 × 2 = 56,
42/28 = 42 × 2/28 × 2 = 84/56 - Likewise, for the 2nd fraction, since 56 × 1 = 56,
81/56 = 81 × 1/56 × 1 = 81/56 - Subtract the two like fractions:
84/56 - 81/56 = 84 - 81/56 = 3/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-81/56 42/56-81/56 42/84-81/56