Subtract 40/81 from 18/6
1st number: 3 0/6, 2nd number: 40/81
18/6 - 40/81 is 203/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 6 × 27 = 162,
18/6 = 18 × 27/6 × 27 = 486/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
40/81 = 40 × 2/81 × 2 = 80/162 - Subtract the two like fractions:
486/162 - 80/162 = 486 - 80/162 = 406/162 - After reducing the fraction, the answer is 203/81
- In mixed form: 241/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6-40/81 18/6-80/81 18/12-40/81 54/6-40/81 90/6-40/81 18/30-40/81 18/42-40/81