Add 30/18 and 9/42
1st number: 1 12/18, 2nd number: 9/42
30/18 + 9/42 is 79/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
9/42 = 9 × 3/42 × 3 = 27/126 - Add the two like fractions:
210/126 + 27/126 = 210 + 27/126 = 237/126 - 237/126 simplified gives 79/42
- So, 30/18 + 9/42 = 79/42
In mixed form: 137/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+9/42 30/18+18/42 30/36+9/42 30/18+9/84 90/18+9/42 30/18+27/42 30/54+9/42 30/18+45/42 30/90+9/42 30/18+63/42