Add 20/42 and 60/18
1st number: 20/42, 2nd number: 3 6/18
20/42 + 60/18 is 80/21.
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,
20/42 = 20 × 3/42 × 3 = 60/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
60/18 = 60 × 7/18 × 7 = 420/126 - Add the two like fractions:
60/126 + 420/126 = 60 + 420/126 = 480/126 - 480/126 simplified gives 80/21
- So, 20/42 + 60/18 = 80/21
In mixed form: 317/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+60/18 20/84+60/18 20/42+60/36 60/42+60/18 20/42+60/54 20/42+60/90