Add 81/42 and 18/27
1st number: 1 39/42, 2nd number: 18/27
81/42 + 18/27 is 109/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
81/42 = 81 × 9/42 × 9 = 729/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
18/27 = 18 × 14/27 × 14 = 252/378 - Add the two like fractions:
729/378 + 252/378 = 729 + 252/378 = 981/378 - 981/378 simplified gives 109/42
- So, 81/42 + 18/27 = 109/42
In mixed form: 225/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/42+36/27 81/84+18/27 81/42+18/54 81/42+54/27 81/42+18/81 81/42+90/27