Subtract 12/9 from 12/81
1st number: 12/81, 2nd number: 1 3/9
12/81 - 12/9 is -32/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 9 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 81 × 1 = 81,
12/81 = 12 × 1/81 × 1 = 12/81 - Likewise, for the 2nd fraction, since 9 × 9 = 81,
12/9 = 12 × 9/9 × 9 = 108/81 - Subtract the two like fractions:
12/81 - 108/81 = 12 - 108/81 = -96/81 - After reducing the fraction, the answer is -32/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/81-12/9 12/81-24/9 12/81-12/18 36/81-12/9 12/81-36/9 12/81-12/27 60/81-12/9 12/81-60/9 12/81-12/45 84/81-12/9 12/81-84/9 12/81-12/63