Subtract 60/18 from 15/81
1st number: 15/81, 2nd number: 3 6/18
15/81 - 60/18 is -85/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 18 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
15/81 = 15 × 2/81 × 2 = 30/162 - Likewise, for the 2nd fraction, since 18 × 9 = 162,
60/18 = 60 × 9/18 × 9 = 540/162 - Subtract the two like fractions:
30/162 - 540/162 = 30 - 540/162 = -510/162 - After reducing the fraction, the answer is -85/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/81-60/18 15/81-60/36 45/81-60/18 15/81-60/54 75/81-60/18 15/81-60/90