Add 18/42 and 18/9
1st number: 18/42, 2nd number: 2 0/9
18/42 + 18/9 is 17/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
18/42 = 18 × 3/42 × 3 = 54/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
18/9 = 18 × 14/9 × 14 = 252/126 - Add the two like fractions:
54/126 + 252/126 = 54 + 252/126 = 306/126 - 306/126 simplified gives 17/7
- So, 18/42 + 18/9 = 17/7
In mixed form: 23/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+18/9 18/42+36/9 18/84+18/9 54/42+18/9 18/42+54/9 18/42+18/27 90/42+18/9 18/42+90/9 18/42+18/45 18/42+18/63