Add 18/27 and 1/81
18/27 + 1/81 is 55/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 81 is 81
Next, find the equivalent fraction of both fractional numbers with denominator 81 - For the 1st fraction, since 27 × 3 = 81,
18/27 = 18 × 3/27 × 3 = 54/81 - Likewise, for the 2nd fraction, since 81 × 1 = 81,
1/81 = 1 × 1/81 × 1 = 1/81 - Add the two like fractions:
54/81 + 1/81 = 54 + 1/81 = 55/81 - So, 18/27 + 1/81 = 55/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/27+1/81 18/27+2/81 18/54+1/81 54/27+1/81 18/27+3/81 18/81+1/81 90/27+1/81 18/27+5/81 18/27+7/81