Answers

Add 63/84 and 18/15

1^st number: 63/84, 2^nd number: 1 3/15

63/84 + 18/15 is 39/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 15 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 15 × 28 = 420,
   18/15 = 18 × 28/15 × 28 = 504/420
4. Add the two like fractions:
   315/420 + 504/420 = 315 + 504/420 = 819/420
5. 819/420 simplified gives 39/20
6. So, 63/84 + 18/15 = 39/20
   In mixed form: 119/20

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