Subtract 15/18 from 3/54
3/54 - 15/18 is -7/9.
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,
3/54 = 3 × 1/54 × 1 = 3/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
15/18 = 15 × 3/18 × 3 = 45/54 - Subtract the two like fractions:
3/54 - 45/54 = 3 - 45/54 = -42/54 - After reducing the fraction, the answer is -7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/54-15/18 3/54-30/18 3/54-15/36 9/54-15/18 3/54-45/18 3/54-15/54 15/54-15/18 3/54-75/18 3/54-15/90 21/54-15/18