Answers

Add 70/15 and 63/84

1^st number: 4 10/15, 2^nd number: 63/84

70/15 + 63/84 is 65/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 84 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   70/15 = 70 × 28/15 × 28 = 1960/420
3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
   63/84 = 63 × 5/84 × 5 = 315/420
4. Add the two like fractions:
   1960/420 + 315/420 = 1960 + 315/420 = 2275/420
5. 2275/420 simplified gives 65/12
6. So, 70/15 + 63/84 = 65/12
   In mixed form: 55/12

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