Answers

Add 63/45 and 21/84

1^st number: 1 18/45, 2^nd number: 21/84

63/45 + 21/84 is 33/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 84 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 45 × 28 = 1260,
   63/45 = 63 × 28/45 × 28 = 1764/1260
3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
   21/84 = 21 × 15/84 × 15 = 315/1260
4. Add the two like fractions:
   1764/1260 + 315/1260 = 1764 + 315/1260 = 2079/1260
5. 2079/1260 simplified gives 33/20
6. So, 63/45 + 21/84 = 33/20
   In mixed form: 113/20

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