Add 15/9 and 18/42
1st number: 1 6/9, 2nd number: 18/42
15/9 + 18/42 is 44/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
15/9 = 15 × 14/9 × 14 = 210/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
18/42 = 18 × 3/42 × 3 = 54/126 - Add the two like fractions:
210/126 + 54/126 = 210 + 54/126 = 264/126 - 264/126 simplified gives 44/21
- So, 15/9 + 18/42 = 44/21
In mixed form: 22/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/9+18/42 15/9+36/42 15/18+18/42 15/9+18/84 45/9+18/42 15/9+54/42 15/27+18/42 75/9+18/42 15/9+90/42 15/45+18/42 15/63+18/42