Add 12/18 and 36/42
12/18 + 36/42 is 32/21.
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,
12/18 = 12 × 7/18 × 7 = 84/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
36/42 = 36 × 3/42 × 3 = 108/126 - Add the two like fractions:
84/126 + 108/126 = 84 + 108/126 = 192/126 - 192/126 simplified gives 32/21
- So, 12/18 + 36/42 = 32/21
In mixed form: 111/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/18+36/42 12/18+72/42 12/36+36/42 12/18+36/84 36/18+36/42 12/54+36/42 60/18+36/42 12/90+36/42 84/18+36/42