Add 84/12 and 42/27
1st number: 7 0/12, 2nd number: 1 15/27
84/12 + 42/27 is 77/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
84/12 = 84 × 9/12 × 9 = 756/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
42/27 = 42 × 4/27 × 4 = 168/108 - Add the two like fractions:
756/108 + 168/108 = 756 + 168/108 = 924/108 - 924/108 simplified gives 77/9
- So, 84/12 + 42/27 = 77/9
In mixed form: 85/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+84/27 84/24+42/27 84/12+42/54 84/36+42/27 84/12+42/81 84/60+42/27