Add 84/42 and 42/12
1st number: 2 0/42, 2nd number: 3 6/12
84/42 + 42/12 is 11/2.
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,
84/42 = 84 × 2/42 × 2 = 168/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84 - Add the two like fractions:
168/84 + 294/84 = 168 + 294/84 = 462/84 - 462/84 simplified gives 11/2
- So, 84/42 + 42/12 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+84/12 84/42+42/24 84/42+42/36 84/42+42/60 84/42+42/84