Subtract 90/12 from 10/9
1st number: 1 1/9, 2nd number: 7 6/12
10/9 - 90/12 is -115/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 12 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 9 × 4 = 36,
10/9 = 10 × 4/9 × 4 = 40/36 - Likewise, for the 2nd fraction, since 12 × 3 = 36,
90/12 = 90 × 3/12 × 3 = 270/36 - Subtract the two like fractions:
40/36 - 270/36 = 40 - 270/36 = -230/36 - After reducing the fraction, the answer is -115/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/9-90/12 10/18-90/12 10/9-90/24 30/9-90/12 10/27-90/12 10/9-90/36 50/9-90/12 10/45-90/12 10/9-90/60 70/9-90/12 10/63-90/12 10/9-90/84