Subtract 1/81 from 84/18
1st number: 4 12/18, 2nd number: 1/81
84/18 - 1/81 is 377/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 18 × 9 = 162,
84/18 = 84 × 9/18 × 9 = 756/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
1/81 = 1 × 2/81 × 2 = 2/162 - Subtract the two like fractions:
756/162 - 2/162 = 756 - 2/162 = 754/162 - After reducing the fraction, the answer is 377/81
- In mixed form: 453/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-2/81 84/36-1/81 84/18-3/81 84/54-1/81 84/18-5/81 84/90-1/81 84/18-7/81