Add 8/42 and 84/12
1st number: 8/42, 2nd number: 7 0/12
8/42 + 84/12 is 151/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
8/42 = 8 × 2/42 × 2 = 16/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
84/12 = 84 × 7/12 × 7 = 588/84 - Add the two like fractions:
16/84 + 588/84 = 16 + 588/84 = 604/84 - 604/84 simplified gives 151/21
- So, 8/42 + 84/12 = 151/21
In mixed form: 74/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+84/12 8/84+84/12 8/42+84/24 24/42+84/12 8/42+84/36 40/42+84/12 8/42+84/60 56/42+84/12