Add 12/42 and 28/81
12/42 + 28/81 is 358/567.
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,
12/42 = 12 × 27/42 × 27 = 324/1134 - Likewise, for the 2nd fraction, since 81 × 14 = 1134,
28/81 = 28 × 14/81 × 14 = 392/1134 - Add the two like fractions:
324/1134 + 392/1134 = 324 + 392/1134 = 716/1134 - 716/1134 simplified gives 358/567
- So, 12/42 + 28/81 = 358/567
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+28/81 12/42+56/81 12/84+28/81 36/42+28/81 12/42+84/81 60/42+28/81 84/42+28/81