Subtract 10/81 from 20/24
20/24 - 10/81 is 115/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 81 is 648
Next, find the equivalent fraction of both fractional numbers with denominator 648 - For the 1st fraction, since 24 × 27 = 648,
20/24 = 20 × 27/24 × 27 = 540/648 - Likewise, for the 2nd fraction, since 81 × 8 = 648,
10/81 = 10 × 8/81 × 8 = 80/648 - Subtract the two like fractions:
540/648 - 80/648 = 540 - 80/648 = 460/648 - After reducing the fraction, the answer is 115/162
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/24-10/81 20/24-20/81 20/48-10/81 60/24-10/81 20/24-30/81 20/72-10/81 20/24-50/81 20/24-70/81