Subtract 45/18 from 40/12
1st number: 3 4/12, 2nd number: 2 9/18
40/12 - 45/18 is 5/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
40/12 = 40 × 3/12 × 3 = 120/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
45/18 = 45 × 2/18 × 2 = 90/36 - Subtract the two like fractions:
120/36 - 90/36 = 120 - 90/36 = 30/36 - After reducing the fraction, the answer is 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/12-45/18 40/12-90/18 40/24-45/18 40/12-45/36 40/36-45/18 40/12-45/54 40/60-45/18 40/12-45/90 40/84-45/18