Subtract 18/3 from 30/18
1st number: 1 12/18, 2nd number: 6 0/3
30/18 - 18/3 is -13/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 3 is 18
Next, find the equivalent fraction of both fractional numbers with denominator 18 - For the 1st fraction, since 18 × 1 = 18,
30/18 = 30 × 1/18 × 1 = 30/18 - Likewise, for the 2nd fraction, since 3 × 6 = 18,
18/3 = 18 × 6/3 × 6 = 108/18 - Subtract the two like fractions:
30/18 - 108/18 = 30 - 108/18 = -78/18 - After reducing the fraction, the answer is -13/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-18/3 30/18-36/3 30/36-18/3 30/18-18/6 90/18-18/3 30/18-54/3 30/54-18/3 30/18-18/9 30/18-90/3 30/90-18/3 30/18-18/15 30/18-18/21