Answers

Add 70/9 and 50/21

1^st number: 7 7/9, 2^nd number: 2 8/21

70/9 + 50/21 is 640/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 21 is 63
   
   Next, find the equivalent fraction of both fractional numbers with denominator 63
2. For the 1st fraction, since 9 × 7 = 63,
   70/9 = 70 × 7/9 × 7 = 490/63
3. Likewise, for the 2nd fraction, since 21 × 3 = 63,
   50/21 = 50 × 3/21 × 3 = 150/63
4. Add the two like fractions:
   490/63 + 150/63 = 490 + 150/63 = 640/63
5. So, 70/9 + 50/21 = 640/63
   In mixed form: 1010/63

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