Subtract 27/4 from 18/27
1st number: 18/27, 2nd number: 6 3/4
18/27 - 27/4 is -73/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 4 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 27 × 4 = 108,
18/27 = 18 × 4/27 × 4 = 72/108 - Likewise, for the 2nd fraction, since 4 × 27 = 108,
27/4 = 27 × 27/4 × 27 = 729/108 - Subtract the two like fractions:
72/108 - 729/108 = 72 - 729/108 = -657/108 - After reducing the fraction, the answer is -73/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/27-27/4 18/27-54/4 18/54-27/4 18/27-27/8 54/27-27/4 18/27-81/4 18/81-27/4 18/27-27/12 90/27-27/4 18/27-27/20 18/27-27/28