Subtract 20/27 from 18/54
18/54 - 20/27 is -11/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
18/54 = 18 × 1/54 × 1 = 18/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
20/27 = 20 × 2/27 × 2 = 40/54 - Subtract the two like fractions:
18/54 - 40/54 = 18 - 40/54 = -22/54 - After reducing the fraction, the answer is -11/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/54-20/27 18/54-40/27 18/54-20/54 18/54-60/27 18/54-20/81 90/54-20/27