Subtract 81/28 from 1/3
1st number: 1/3, 2nd number: 2 25/28
1/3 - 81/28 is -215/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 3 × 28 = 84,
1/3 = 1 × 28/3 × 28 = 28/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
81/28 = 81 × 3/28 × 3 = 243/84 - Subtract the two like fractions:
28/84 - 243/84 = 28 - 243/84 = -215/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3-81/28 1/6-81/28 1/3-81/56 1/9-81/28 1/3-81/84 5/3-81/28 1/15-81/28 7/3-81/28 1/21-81/28