Answers

Add 12/63 and 21/72

12/63 + 21/72 is 27/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 63 × 8 = 504,
   12/63 = 12 × 8/63 × 8 = 96/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   21/72 = 21 × 7/72 × 7 = 147/504
4. Add the two like fractions:
   96/504 + 147/504 = 96 + 147/504 = 243/504
5. 243/504 simplified gives 27/56
6. So, 12/63 + 21/72 = 27/56

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