Subtract 90/12 from 18/6
1st number: 3 0/6, 2nd number: 7 6/12
18/6 - 90/12 is -9/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 6 × 2 = 12,
18/6 = 18 × 2/6 × 2 = 36/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Subtract the two like fractions:
36/12 - 90/12 = 36 - 90/12 = -54/12 - After reducing the fraction, the answer is -9/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6-90/12 18/12-90/12 18/6-90/24 54/6-90/12 18/6-90/36 90/6-90/12 18/30-90/12 18/6-90/60 18/42-90/12 18/6-90/84