Add 18/42 and 30/12
1st number: 18/42, 2nd number: 2 6/12
18/42 + 30/12 is 41/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 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 12 × 7 = 84,
30/12 = 30 × 7/12 × 7 = 210/84 - Add the two like fractions:
36/84 + 210/84 = 36 + 210/84 = 246/84 - 246/84 simplified gives 41/14
- So, 18/42 + 30/12 = 41/14
In mixed form: 213/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+30/12 18/42+60/12 18/84+30/12 18/42+30/24 54/42+30/12 18/42+90/12 18/42+30/36 90/42+30/12 18/42+30/60 18/42+30/84