Subtract 18/9 from 12/54
1st number: 12/54, 2nd number: 2 0/9
12/54 - 18/9 is -16/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 9 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 54 × 1 = 54,
12/54 = 12 × 1/54 × 1 = 12/54 - Likewise, for the 2nd fraction, since 9 × 6 = 54,
18/9 = 18 × 6/9 × 6 = 108/54 - Subtract the two like fractions:
12/54 - 108/54 = 12 - 108/54 = -96/54 - After reducing the fraction, the answer is -16/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/54-18/9 12/54-36/9 36/54-18/9 12/54-54/9 12/54-18/27 60/54-18/9 12/54-90/9 12/54-18/45 84/54-18/9 12/54-18/63