Answers

Add 30/15 and 70/21

1^st number: 2 0/15, 2^nd number: 3 7/21

30/15 + 70/21 is 16/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 21 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 15 × 7 = 105,
   30/15 = 30 × 7/15 × 7 = 210/105
3. Likewise, for the 2nd fraction, since 21 × 5 = 105,
   70/21 = 70 × 5/21 × 5 = 350/105
4. Add the two like fractions:
   210/105 + 350/105 = 210 + 350/105 = 560/105
5. 560/105 simplified gives 16/3
6. So, 30/15 + 70/21 = 16/3
   In mixed form: 51/3

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