Add 27/42 and 20/81
27/42 + 20/81 is 1009/1134.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134
Next, find the equivalent fraction of both fractional numbers with denominator 1134 - For the 1st fraction, since 42 × 27 = 1134,
27/42 = 27 × 27/42 × 27 = 729/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
20/81 = 20 × 14/81 × 14 = 280/1134 - Add the two like fractions:
729/1134 + 280/1134 = 729 + 280/1134 = 1009/1134 - So, 27/42 + 20/81 = 1009/1134
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+20/81 27/42+40/81 27/84+20/81 81/42+20/81 27/42+60/81