Add 21/12 and 24/63
1st number: 1 9/12, 2nd number: 24/63
21/12 + 24/63 is 179/84.
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,
24/63 = 24 × 4/63 × 4 = 96/252 - Add the two like fractions:
441/252 + 96/252 = 441 + 96/252 = 537/252 - 537/252 simplified gives 179/84
- So, 21/12 + 24/63 = 179/84
In mixed form: 211/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+24/63 21/12+48/63 21/24+24/63 63/12+24/63 21/12+72/63 21/36+24/63 21/60+24/63 21/84+24/63