Subtract 49/81 from 15/18
15/18 - 49/81 is 37/162.
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,
15/18 = 15 × 9/18 × 9 = 135/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
49/81 = 49 × 2/81 × 2 = 98/162 - Subtract the two like fractions:
135/162 - 98/162 = 135 - 98/162 = 37/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-49/81 15/18-98/81 15/36-49/81 45/18-49/81 15/54-49/81 75/18-49/81 15/90-49/81