Add 84/12 and 20/18
1st number: 7 0/12, 2nd number: 1 2/18
84/12 + 20/18 is 73/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
84/12 = 84 × 3/12 × 3 = 252/36 - Likewise, for the 2nd fraction, since 18 × 2 = 36,
20/18 = 20 × 2/18 × 2 = 40/36 - Add the two like fractions:
252/36 + 40/36 = 252 + 40/36 = 292/36 - 292/36 simplified gives 73/9
- So, 84/12 + 20/18 = 73/9
In mixed form: 81/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12+40/18 84/24+20/18 84/12+20/36 84/12+60/18 84/36+20/18 84/12+20/54 84/60+20/18 84/12+20/90