Add 12/42 and 48/9
1st number: 12/42, 2nd number: 5 3/9
12/42 + 48/9 is 118/21.
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,
12/42 = 12 × 3/42 × 3 = 36/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
48/9 = 48 × 14/9 × 14 = 672/126 - Add the two like fractions:
36/126 + 672/126 = 36 + 672/126 = 708/126 - 708/126 simplified gives 118/21
- So, 12/42 + 48/9 = 118/21
In mixed form: 513/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+48/9 12/42+96/9 12/84+48/9 12/42+48/18 36/42+48/9 12/42+48/27 60/42+48/9 12/42+48/45 84/42+48/9 12/42+48/63