Answers

Add 28/63 and 21/72

28/63 + 21/72 is 53/72.

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,
   28/63 = 28 × 8/63 × 8 = 224/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   21/72 = 21 × 7/72 × 7 = 147/504
4. Add the two like fractions:
   224/504 + 147/504 = 224 + 147/504 = 371/504
5. 371/504 simplified gives 53/72
6. So, 28/63 + 21/72 = 53/72

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