Answers

Add 63/84 and 45/20

1^st number: 63/84, 2^nd number: 2 5/20

63/84 + 45/20 is 3/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   63/84 = 63 × 5/84 × 5 = 315/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   45/20 = 45 × 21/20 × 21 = 945/420
4. Add the two like fractions:
   315/420 + 945/420 = 315 + 945/420 = 1260/420
5. 1260/420 simplified gives 3/1
6. So, 63/84 + 45/20 = 3/1

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