Subtract 40/81 from 4/3
1st number: 1 1/3, 2nd number: 40/81
4/3 - 40/81 is 68/81.
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,
4/3 = 4 × 27/3 × 27 = 108/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
40/81 = 40 × 1/81 × 1 = 40/81 - Subtract the two like fractions:
108/81 - 40/81 = 108 - 40/81 = 68/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/3-40/81 4/3-80/81 4/6-40/81 12/3-40/81 4/9-40/81 20/3-40/81 4/15-40/81 28/3-40/81 4/21-40/81