Answers

Add 70/12 and 16/21

1^st number: 5 10/12, 2^nd number: 16/21

70/12 + 16/21 is 277/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 12 × 7 = 84,
   70/12 = 70 × 7/12 × 7 = 490/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   16/21 = 16 × 4/21 × 4 = 64/84
4. Add the two like fractions:
   490/84 + 64/84 = 490 + 64/84 = 554/84
5. 554/84 simplified gives 277/42
6. So, 70/12 + 16/21 = 277/42
   In mixed form: 625/42

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