Subtract 81/6 from 90/12
1st number: 7 6/12, 2nd number: 13 3/6
90/12 - 81/6 is -6/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 6 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
90/12 = 90 × 1/12 × 1 = 90/12 - Likewise, for the 2nd fraction, since 6 × 2 = 12,
81/6 = 81 × 2/6 × 2 = 162/12 - Subtract the two like fractions:
90/12 - 162/12 = 90 - 162/12 = -72/12 - After reducing the fraction, the answer is -6/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24-81/6 90/12-81/12 90/36-81/6 90/12-81/18 90/60-81/6 90/12-81/30 90/84-81/6 90/12-81/42