Subtract 20/54 from 27/18
1st number: 1 9/18, 2nd number: 20/54
27/18 - 20/54 is 61/54.
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,
27/18 = 27 × 3/18 × 3 = 81/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
20/54 = 20 × 1/54 × 1 = 20/54 - Subtract the two like fractions:
81/54 - 20/54 = 81 - 20/54 = 61/54 - In mixed form: 17/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/18-20/54 27/18-40/54 27/36-20/54 81/18-20/54 27/18-60/54 27/54-20/54 27/90-20/54