Add 3/42 and 3/84
3/42 + 3/84 is 3/28.
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,
3/42 = 3 × 2/42 × 2 = 6/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
3/84 = 3 × 1/84 × 1 = 3/84 - Add the two like fractions:
6/84 + 3/84 = 6 + 3/84 = 9/84 - 9/84 simplified gives 3/28
- So, 3/42 + 3/84 = 3/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+3/84 3/42+6/84 3/84+3/84 9/42+3/84 3/42+9/84 15/42+3/84 3/42+15/84 21/42+3/84 3/42+21/84