Subtract 81/12 from 8/4
1st number: 2 0/4, 2nd number: 6 9/12
8/4 - 81/12 is -19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
8/4 = 8 × 3/4 × 3 = 24/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
81/12 = 81 × 1/12 × 1 = 81/12 - Subtract the two like fractions:
24/12 - 81/12 = 24 - 81/12 = -57/12 - After reducing the fraction, the answer is -19/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/4-81/12 8/4-81/24 24/4-81/12 8/12-81/12 8/4-81/36 40/4-81/12 8/20-81/12 8/4-81/60 56/4-81/12 8/28-81/12 8/4-81/84