Subtract 84/81 from 40/12
1st number: 3 4/12, 2nd number: 1 3/81
40/12 - 84/81 is 62/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
40/12 = 40 × 27/12 × 27 = 1080/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
84/81 = 84 × 4/81 × 4 = 336/324 - Subtract the two like fractions:
1080/324 - 336/324 = 1080 - 336/324 = 744/324 - After reducing the fraction, the answer is 62/27
- In mixed form: 28/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-84/81 40/24-84/81 40/36-84/81 40/60-84/81 40/84-84/81