Answers

Add 63/21 and 70/15

1^st number: 3 0/21, 2^nd number: 4 10/15

63/21 + 70/15 is 23/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 15 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   63/21 = 63 × 5/21 × 5 = 315/105
3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
   70/15 = 70 × 7/15 × 7 = 490/105
4. Add the two like fractions:
   315/105 + 490/105 = 315 + 490/105 = 805/105
5. 805/105 simplified gives 23/3
6. So, 63/21 + 70/15 = 23/3
   In mixed form: 72/3

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