Subtract 15/54 from 20/18
1st number: 1 2/18, 2nd number: 15/54
20/18 - 15/54 is 5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 54 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
20/18 = 20 × 3/18 × 3 = 60/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
15/54 = 15 × 1/54 × 1 = 15/54 - Subtract the two like fractions:
60/54 - 15/54 = 60 - 15/54 = 45/54 - After reducing the fraction, the answer is 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/18-15/54 20/18-30/54 20/36-15/54 60/18-15/54 20/18-45/54 20/54-15/54 20/18-75/54 20/90-15/54