Add 18/12 and 3/42
1st number: 1 6/12, 2nd number: 3/42
18/12 + 3/42 is 11/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
18/12 = 18 × 7/12 × 7 = 126/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
3/42 = 3 × 2/42 × 2 = 6/84 - Add the two like fractions:
126/84 + 6/84 = 126 + 6/84 = 132/84 - 132/84 simplified gives 11/7
- So, 18/12 + 3/42 = 11/7
In mixed form: 14/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12+3/42 18/12+6/42 18/24+3/42 18/12+3/84 54/12+3/42 18/12+9/42 18/36+3/42 90/12+3/42 18/12+15/42 18/60+3/42 18/12+21/42 18/84+3/42