Subtract 18/9 from 30/12
1st number: 2 6/12, 2nd number: 2 0/9
30/12 - 18/9 is 1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
30/12 = 30 × 3/12 × 3 = 90/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
18/9 = 18 × 4/9 × 4 = 72/36 - Subtract the two like fractions:
90/36 - 72/36 = 90 - 72/36 = 18/36 - After reducing the fraction, the answer is 1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-18/9 30/12-36/9 30/24-18/9 90/12-18/9 30/12-54/9 30/36-18/9 30/12-18/27 30/12-90/9 30/60-18/9 30/12-18/45 30/84-18/9 30/12-18/63