Subtract 45/12 from 36/18
1st number: 2 0/18, 2nd number: 3 9/12
36/18 - 45/12 is -7/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
36/18 = 36 × 2/18 × 2 = 72/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
45/12 = 45 × 3/12 × 3 = 135/36 - Subtract the two like fractions:
72/36 - 135/36 = 72 - 135/36 = -63/36 - After reducing the fraction, the answer is -7/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/18-45/12 36/18-90/12 36/18-45/24 36/54-45/12 36/18-45/36 36/90-45/12 36/18-45/60 36/18-45/84