Add 8/42 and 30/18
1st number: 8/42, 2nd number: 1 12/18
8/42 + 30/18 is 13/7.
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,
8/42 = 8 × 3/42 × 3 = 24/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Add the two like fractions:
24/126 + 210/126 = 24 + 210/126 = 234/126 - 234/126 simplified gives 13/7
- So, 8/42 + 30/18 = 13/7
In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+30/18 8/42+60/18 8/84+30/18 8/42+30/36 24/42+30/18 8/42+90/18 8/42+30/54 40/42+30/18 8/42+30/90 56/42+30/18