Subtract 20/6 from 8/81
1st number: 8/81, 2nd number: 3 2/6
8/81 - 20/6 is -262/81.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 6 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
8/81 = 8 × 2/81 × 2 = 16/162 - Likewise, for the 2nd fraction, since 6 × 27 = 162,
20/6 = 20 × 27/6 × 27 = 540/162 - Subtract the two like fractions:
16/162 - 540/162 = 16 - 540/162 = -524/162 - After reducing the fraction, the answer is -262/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/81-20/6 8/81-40/6 8/81-20/12 24/81-20/6 8/81-60/6 8/81-20/18 40/81-20/6 8/81-20/30 56/81-20/6 8/81-20/42