Answers

Add 28/63 and 21/45

28/63 + 21/45 is 41/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 45 is 315
   
   Next, find the equivalent fraction of both fractional numbers with denominator 315
2. For the 1st fraction, since 63 × 5 = 315,
   28/63 = 28 × 5/63 × 5 = 140/315
3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
   21/45 = 21 × 7/45 × 7 = 147/315
4. Add the two like fractions:
   140/315 + 147/315 = 140 + 147/315 = 287/315
5. 287/315 simplified gives 41/45
6. So, 28/63 + 21/45 = 41/45

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