Add 15/18 and 35/42
15/18 + 35/42 is 5/3.
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,
15/18 = 15 × 7/18 × 7 = 105/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
35/42 = 35 × 3/42 × 3 = 105/126 - Add the two like fractions:
105/126 + 105/126 = 105 + 105/126 = 210/126 - 210/126 simplified gives 5/3
- So, 15/18 + 35/42 = 5/3
In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18+35/42 15/18+70/42 15/36+35/42 15/18+35/84 45/18+35/42 15/54+35/42 75/18+35/42 15/90+35/42