Add 25/42 and 56/81
25/42 + 56/81 is 1459/1134.
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,
25/42 = 25 × 27/42 × 27 = 675/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
56/81 = 56 × 14/81 × 14 = 784/1134 - Add the two like fractions:
675/1134 + 784/1134 = 675 + 784/1134 = 1459/1134 - So, 25/42 + 56/81 = 1459/1134
In mixed form: 1325/1134
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+56/81 25/84+56/81 75/42+56/81