Subtract 81/12 from 45/36
1st number: 1 9/36, 2nd number: 6 9/12
45/36 - 81/12 is -11/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 36 × 1 = 36,
45/36 = 45 × 1/36 × 1 = 45/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
81/12 = 81 × 3/12 × 3 = 243/36 - Subtract the two like fractions:
45/36 - 243/36 = 45 - 243/36 = -198/36 - After reducing the fraction, the answer is -11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/36-81/12 45/72-81/12 45/36-81/24 45/36-81/36 45/36-81/60 45/36-81/84