Subtract 30/12 from 5/18
1st number: 5/18, 2nd number: 2 6/12
5/18 - 30/12 is -20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
5/18 = 5 × 2/18 × 2 = 10/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
30/12 = 30 × 3/12 × 3 = 90/36 - Subtract the two like fractions:
10/36 - 90/36 = 10 - 90/36 = -80/36 - After reducing the fraction, the answer is -20/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/18-30/12 5/18-60/12 5/36-30/12 5/18-30/24 15/18-30/12 5/18-90/12 5/54-30/12 5/18-30/36 25/18-30/12 5/90-30/12 5/18-30/60 35/18-30/12 5/18-30/84