Subtract 18/12 from 90/6
1st number: 15 0/6, 2nd number: 1 6/12
90/6 - 18/12 is 27/2.
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,
90/6 = 90 × 2/6 × 2 = 180/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
18/12 = 18 × 1/12 × 1 = 18/12 - Subtract the two like fractions:
180/12 - 18/12 = 180 - 18/12 = 162/12 - After reducing the fraction, the answer is 27/2
- In mixed form: 131/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6-36/12 90/12-18/12 90/6-18/24 90/6-54/12 90/18-18/12 90/6-18/36 90/6-90/12 90/30-18/12 90/6-18/60 90/42-18/12 90/6-18/84