Subtract 45/18 from 18/12
1st number: 1 6/12, 2nd number: 2 9/18
18/12 - 45/18 is -1/1.
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,
45/18 = 45 × 2/18 × 2 = 90/36 - Subtract the two like fractions:
54/36 - 90/36 = 54 - 90/36 = -36/36 - After reducing the fraction, the answer is -1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-45/18 18/12-90/18 18/24-45/18 18/12-45/36 54/12-45/18 18/36-45/18 18/12-45/54 90/12-45/18 18/60-45/18 18/12-45/90 18/84-45/18