Add 63/21 and 12/72
1st number: 3 0/21, 2nd number: 12/72
63/21 + 12/72 is 19/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
63/21 = 63 × 24/21 × 24 = 1512/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Add the two like fractions:
1512/504 + 84/504 = 1512 + 84/504 = 1596/504 - 1596/504 simplified gives 19/6
- So, 63/21 + 12/72 = 19/6
In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+24/72 63/42+12/72 63/21+36/72 63/21+60/72 63/21+84/72