Add 15/42 and 84/18
1st number: 15/42, 2nd number: 4 12/18
15/42 + 84/18 is 211/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
15/42 = 15 × 3/42 × 3 = 45/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
84/18 = 84 × 7/18 × 7 = 588/126 - Add the two like fractions:
45/126 + 588/126 = 45 + 588/126 = 633/126 - 633/126 simplified gives 211/42
- So, 15/42 + 84/18 = 211/42
In mixed form: 51/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/42+84/18 15/84+84/18 15/42+84/36 45/42+84/18 15/42+84/54 75/42+84/18 15/42+84/90