Subtract 18/9 from 7/12
1st number: 7/12, 2nd number: 2 0/9
7/12 - 18/9 is -17/12.
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,
7/12 = 7 × 3/12 × 3 = 21/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
18/9 = 18 × 4/9 × 4 = 72/36 - Subtract the two like fractions:
21/36 - 72/36 = 21 - 72/36 = -51/36 - After reducing the fraction, the answer is -17/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12-18/9 7/12-36/9 7/24-18/9 21/12-18/9 7/12-54/9 7/36-18/9 7/12-18/27 35/12-18/9 7/12-90/9 7/60-18/9 7/12-18/45 49/12-18/9 7/84-18/9 7/12-18/63