Subtract 28/18 from 18/12
1st number: 1 6/12, 2nd number: 1 10/18
18/12 - 28/18 is -1/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
18/12 = 18 × 3/12 × 3 = 54/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
28/18 = 28 × 2/18 × 2 = 56/36 - Subtract the two like fractions:
54/36 - 56/36 = 54 - 56/36 = -2/36 - After reducing the fraction, the answer is -1/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-28/18 18/12-56/18 18/24-28/18 18/12-28/36 54/12-28/18 18/12-84/18 18/36-28/18 18/12-28/54 90/12-28/18 18/60-28/18 18/12-28/90 18/84-28/18