Subtract 7/18 from 15/54
15/54 - 7/18 is -1/9.
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,
15/54 = 15 × 1/54 × 1 = 15/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
7/18 = 7 × 3/18 × 3 = 21/54 - Subtract the two like fractions:
15/54 - 21/54 = 15 - 21/54 = -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: 30/54-7/18 15/54-14/18 15/54-7/36 45/54-7/18 15/54-21/18 15/54-7/54 75/54-7/18 15/54-35/18 15/54-7/90 15/54-49/18