Add 21/12 and 10/63
1st number: 1 9/12, 2nd number: 10/63
21/12 + 10/63 is 481/252.
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,
10/63 = 10 × 4/63 × 4 = 40/252 - Add the two like fractions:
441/252 + 40/252 = 441 + 40/252 = 481/252 - So, 21/12 + 10/63 = 481/252
In mixed form: 1229/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12+10/63 21/12+20/63 21/24+10/63 63/12+10/63 21/12+30/63 21/36+10/63 21/12+50/63 21/60+10/63 21/12+70/63 21/84+10/63