Add 9/12 and 84/63
1st number: 9/12, 2nd number: 1 21/63
9/12 + 84/63 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 12 × 21 = 252,
9/12 = 9 × 21/12 × 21 = 189/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
84/63 = 84 × 4/63 × 4 = 336/252 - Add the two like fractions:
189/252 + 336/252 = 189 + 336/252 = 525/252 - 525/252 simplified gives 25/12
- So, 9/12 + 84/63 = 25/12
In mixed form: 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/12+84/63 9/24+84/63 27/12+84/63 9/36+84/63 45/12+84/63 9/60+84/63 63/12+84/63 9/84+84/63