Subtract 20/18 from 27/54
1st number: 27/54, 2nd number: 1 2/18
27/54 - 20/18 is -11/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 18 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
27/54 = 27 × 1/54 × 1 = 27/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
20/18 = 20 × 3/18 × 3 = 60/54 - Subtract the two like fractions:
27/54 - 60/54 = 27 - 60/54 = -33/54 - After reducing the fraction, the answer is -11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 27/54-40/18 27/54-20/36 81/54-20/18 27/54-60/18 27/54-20/54 27/54-20/90