Subtract 12/81 from 4/9
4/9 - 12/81 is 8/27.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 9 × 9 = 81,
4/9 = 4 × 9/9 × 9 = 36/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
12/81 = 12 × 1/81 × 1 = 12/81 - Subtract the two like fractions:
36/81 - 12/81 = 36 - 12/81 = 24/81 - After reducing the fraction, the answer is 8/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/9-12/81 4/9-24/81 4/18-12/81 12/9-12/81 4/9-36/81 4/27-12/81 20/9-12/81 4/9-60/81 4/45-12/81 28/9-12/81 4/9-84/81 4/63-12/81