Subtract 4/81 from 28/3
1st number: 9 1/3, 2nd number: 4/81
28/3 - 4/81 is 752/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 3 × 27 = 81,
28/3 = 28 × 27/3 × 27 = 756/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
4/81 = 4 × 1/81 × 1 = 4/81 - Subtract the two like fractions:
756/81 - 4/81 = 756 - 4/81 = 752/81 - In mixed form: 923/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/3-4/81 28/3-8/81 28/6-4/81 84/3-4/81 28/3-12/81 28/9-4/81 28/3-20/81 28/15-4/81 28/3-28/81 28/21-4/81