Add 63/12 and 10/21
1st number: 5 3/12, 2nd number: 10/21
63/12 + 10/21 is 481/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
63/12 = 63 × 7/12 × 7 = 441/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
10/21 = 10 × 4/21 × 4 = 40/84 - Add the two like fractions:
441/84 + 40/84 = 441 + 40/84 = 481/84 - So, 63/12 + 10/21 = 481/84
In mixed form: 561/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/12+20/21 63/24+10/21 63/12+10/42 63/12+30/21 63/36+10/21 63/12+10/63 63/12+50/21 63/60+10/21 63/12+70/21 63/84+10/21