Add 20/36 and 30/81
20/36 + 30/81 is 25/27.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 36 × 9 = 324,
20/36 = 20 × 9/36 × 9 = 180/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
30/81 = 30 × 4/81 × 4 = 120/324 - Add the two like fractions:
180/324 + 120/324 = 180 + 120/324 = 300/324 - 300/324 simplified gives 25/27
- So, 20/36 + 30/81 = 25/27
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/36+30/81 20/36+60/81 20/72+30/81 60/36+30/81 20/36+90/81