Subtract 56/81 from 28/18
1st number: 1 10/18, 2nd number: 56/81
28/18 - 56/81 is 70/81.
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,
28/18 = 28 × 9/18 × 9 = 252/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
56/81 = 56 × 2/81 × 2 = 112/162 - Subtract the two like fractions:
252/162 - 112/162 = 252 - 112/162 = 140/162 - After reducing the fraction, the answer is 70/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18-56/81 28/36-56/81 84/18-56/81 28/54-56/81 28/90-56/81