Add 50/81 and 20/54
50/81 + 20/54 is 80/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 54 is 162
Next, find the equivalent fraction of both fractional numbers with denominator 162 - For the 1st fraction, since 81 × 2 = 162,
50/81 = 50 × 2/81 × 2 = 100/162 - Likewise, for the 2nd fraction, since 54 × 3 = 162,
20/54 = 20 × 3/54 × 3 = 60/162 - Add the two like fractions:
100/162 + 60/162 = 100 + 60/162 = 160/162 - 160/162 simplified gives 80/81
- So, 50/81 + 20/54 = 80/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/81+40/54 50/81+60/54