Add 7/84 and 42/18
1st number: 7/84, 2nd number: 2 6/18
7/84 + 42/18 is 29/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 84 × 3 = 252,
7/84 = 7 × 3/84 × 3 = 21/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
42/18 = 42 × 14/18 × 14 = 588/252 - Add the two like fractions:
21/252 + 588/252 = 21 + 588/252 = 609/252 - 609/252 simplified gives 29/12
- So, 7/84 + 42/18 = 29/12
In mixed form: 25/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84+42/18 7/84+84/18 7/84+42/36 21/84+42/18 7/84+42/54 35/84+42/18 7/84+42/90 49/84+42/18