Subtract 90/9 from 3/12
1st number: 3/12, 2nd number: 10 0/9
3/12 - 90/9 is -39/4.
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,
3/12 = 3 × 3/12 × 3 = 9/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
90/9 = 90 × 4/9 × 4 = 360/36 - Subtract the two like fractions:
9/36 - 360/36 = 9 - 360/36 = -351/36 - After reducing the fraction, the answer is -39/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12-90/9 3/24-90/9 3/12-90/18 9/12-90/9 3/36-90/9 3/12-90/27 15/12-90/9 3/60-90/9 3/12-90/45 21/12-90/9 3/84-90/9 3/12-90/63