Add 84/12 and 63/18
1st number: 7 0/12, 2nd number: 3 9/18
84/12 + 63/18 is 21/2.
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,
63/18 = 63 × 2/18 × 2 = 126/36 - Add the two like fractions:
252/36 + 126/36 = 252 + 126/36 = 378/36 - 378/36 simplified gives 21/2
- So, 84/12 + 63/18 = 21/2
In mixed form: 101/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/24+63/18 84/12+63/36 84/36+63/18 84/12+63/54 84/60+63/18 84/12+63/90