Add 21/12 and 6/63
1st number: 1 9/12, 2nd number: 6/63
21/12 + 6/63 is 155/84.
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,
21/12 = 21 × 21/12 × 21 = 441/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
6/63 = 6 × 4/63 × 4 = 24/252 - Add the two like fractions:
441/252 + 24/252 = 441 + 24/252 = 465/252 - 465/252 simplified gives 155/84
- So, 21/12 + 6/63 = 155/84
In mixed form: 171/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+6/63 21/12+12/63 21/24+6/63 63/12+6/63 21/12+18/63 21/36+6/63 21/12+30/63 21/60+6/63 21/12+42/63 21/84+6/63