Subtract 45/9 from 30/12
1st number: 2 6/12, 2nd number: 5 0/9
30/12 - 45/9 is -5/2.
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,
45/9 = 45 × 4/9 × 4 = 180/36 - Subtract the two like fractions:
90/36 - 180/36 = 90 - 180/36 = -90/36 - After reducing the fraction, the answer is -5/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-45/9 30/12-90/9 30/24-45/9 30/12-45/18 90/12-45/9 30/36-45/9 30/12-45/27 30/60-45/9 30/84-45/9 30/12-45/63