Subtract 45/18 from 18/54
1st number: 18/54, 2nd number: 2 9/18
18/54 - 45/18 is -13/6.
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,
18/54 = 18 × 1/54 × 1 = 18/54 - Likewise, for the 2nd fraction, since 18 × 3 = 54,
45/18 = 45 × 3/18 × 3 = 135/54 - Subtract the two like fractions:
18/54 - 135/54 = 18 - 135/54 = -117/54 - After reducing the fraction, the answer is -13/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/54-45/18 18/54-90/18 18/54-45/36 18/54-45/54 90/54-45/18 18/54-45/90