Answers

Add 12/21 and 10/7

1^st number: 12/21, 2^nd number: 1 3/7

12/21 + 10/7 is 2/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 7 is 21
   
   Next, find the equivalent fraction of both fractional numbers with denominator 21
2. For the 1st fraction, since 21 × 1 = 21,
   12/21 = 12 × 1/21 × 1 = 12/21
3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
   10/7 = 10 × 3/7 × 3 = 30/21
4. Add the two like fractions:
   12/21 + 30/21 = 12 + 30/21 = 42/21
5. 42/21 simplified gives 2/1
6. So, 12/21 + 10/7 = 2/1

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