Add 24/42 and 54/81
24/42 + 54/81 is 26/21.
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,
24/42 = 24 × 27/42 × 27 = 648/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
54/81 = 54 × 14/81 × 14 = 756/1134 - Add the two like fractions:
648/1134 + 756/1134 = 648 + 756/1134 = 1404/1134 - 1404/1134 simplified gives 26/21
- So, 24/42 + 54/81 = 26/21
In mixed form: 15/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/42+54/81 24/84+54/81 72/42+54/81