Subtract 27/54 from 7/18
7/18 - 27/54 is -1/9.
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,
7/18 = 7 × 3/18 × 3 = 21/54 - Likewise, for the 2nd fraction, since 54 × 1 = 54,
27/54 = 27 × 1/54 × 1 = 27/54 - Subtract the two like fractions:
21/54 - 27/54 = 21 - 27/54 = -6/54 - After reducing the fraction, the answer is -1/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18-27/54 7/36-27/54 21/18-27/54 7/18-81/54 7/54-27/54 35/18-27/54 7/90-27/54 49/18-27/54