Add 18/42 and 28/84
18/42 + 28/84 is 16/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
18/42 = 18 × 2/42 × 2 = 36/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
28/84 = 28 × 1/84 × 1 = 28/84 - Add the two like fractions:
36/84 + 28/84 = 36 + 28/84 = 64/84 - 64/84 simplified gives 16/21
- So, 18/42 + 28/84 = 16/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+28/84 18/42+56/84 18/84+28/84 54/42+28/84 90/42+28/84