Add 3/42 and 20/18
1st number: 3/42, 2nd number: 1 2/18
3/42 + 20/18 is 149/126.
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,
3/42 = 3 × 3/42 × 3 = 9/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
20/18 = 20 × 7/18 × 7 = 140/126 - Add the two like fractions:
9/126 + 140/126 = 9 + 140/126 = 149/126 - So, 3/42 + 20/18 = 149/126
In mixed form: 123/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42+20/18 3/42+40/18 3/84+20/18 3/42+20/36 9/42+20/18 3/42+60/18 3/42+20/54 15/42+20/18 3/42+20/90 21/42+20/18