Add 20/54 and 15/81
20/54 + 15/81 is 5/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 81 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 54 × 3 = 162,
20/54 = 20 × 3/54 × 3 = 60/162 - Likewise, for the 2nd fraction, since 81 × 2 = 162,
15/81 = 15 × 2/81 × 2 = 30/162 - Add the two like fractions:
60/162 + 30/162 = 60 + 30/162 = 90/162 - 90/162 simplified gives 5/9
- So, 20/54 + 15/81 = 5/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/54+15/81 20/54+30/81 60/54+15/81 20/54+45/81 20/54+75/81