Subtract 15/9 from 90/12
1st number: 7 6/12, 2nd number: 1 6/9
90/12 - 15/9 is 35/6.
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,
90/12 = 90 × 3/12 × 3 = 270/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
15/9 = 15 × 4/9 × 4 = 60/36 - Subtract the two like fractions:
270/36 - 60/36 = 270 - 60/36 = 210/36 - After reducing the fraction, the answer is 35/6
- In mixed form: 55/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-30/9 90/24-15/9 90/12-15/18 90/12-45/9 90/36-15/9 90/12-15/27 90/12-75/9 90/60-15/9 90/12-15/45 90/84-15/9 90/12-15/63