Subtract 90/9 from 27/12
1st number: 2 3/12, 2nd number: 10 0/9
27/12 - 90/9 is -31/4.
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,
27/12 = 27 × 3/12 × 3 = 81/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
90/9 = 90 × 4/9 × 4 = 360/36 - Subtract the two like fractions:
81/36 - 360/36 = 81 - 360/36 = -279/36 - After reducing the fraction, the answer is -31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/12-90/9 27/24-90/9 27/12-90/18 81/12-90/9 27/36-90/9 27/12-90/27 27/60-90/9 27/12-90/45 27/84-90/9 27/12-90/63