Add 6/21 and 63/72
6/21 + 63/72 is 65/56.
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,
6/21 = 6 × 24/21 × 24 = 144/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
63/72 = 63 × 7/72 × 7 = 441/504 - Add the two like fractions:
144/504 + 441/504 = 144 + 441/504 = 585/504 - 585/504 simplified gives 65/56
- So, 6/21 + 63/72 = 65/56
In mixed form: 19/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21+63/72 6/42+63/72 18/21+63/72 6/63+63/72 30/21+63/72 42/21+63/72