Answers

Add 70/30 and 63/21

1^st number: 2 10/30, 2^nd number: 3 0/21

70/30 + 63/21 is 16/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   70/30 = 70 × 7/30 × 7 = 490/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   63/21 = 63 × 10/21 × 10 = 630/210
4. Add the two like fractions:
   490/210 + 630/210 = 490 + 630/210 = 1120/210
5. 1120/210 simplified gives 16/3
6. So, 70/30 + 63/21 = 16/3
   In mixed form: 51/3

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