Subtract 30/12 from 18/36
1st number: 18/36, 2nd number: 2 6/12
18/36 - 30/12 is -2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 36 × 1 = 36,
18/36 = 18 × 1/36 × 1 = 18/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
30/12 = 30 × 3/12 × 3 = 90/36 - Subtract the two like fractions:
18/36 - 90/36 = 18 - 90/36 = -72/36 - After reducing the fraction, the answer is -2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/36-60/12 18/72-30/12 18/36-30/24 54/36-30/12 18/36-90/12 18/36-30/36 90/36-30/12 18/36-30/60 18/36-30/84