Add 12/42 and 81/7
1st number: 12/42, 2nd number: 11 4/7
12/42 + 81/7 is 83/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 7 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
12/42 = 12 × 1/42 × 1 = 12/42 - Likewise, for the 2nd fraction, since 7 × 6 = 42,
81/7 = 81 × 6/7 × 6 = 486/42 - Add the two like fractions:
12/42 + 486/42 = 12 + 486/42 = 498/42 - 498/42 simplified gives 83/7
- So, 12/42 + 81/7 = 83/7
In mixed form: 116/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+81/7 12/84+81/7 12/42+81/14 36/42+81/7 12/42+81/21 60/42+81/7 12/42+81/35 84/42+81/7 12/42+81/49