Answers

Add 20/21 and 15/7

1^st number: 20/21, 2^nd number: 2 1/7

20/21 + 15/7 is 65/21.

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,
   20/21 = 20 × 1/21 × 1 = 20/21
3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
   15/7 = 15 × 3/7 × 3 = 45/21
4. Add the two like fractions:
   20/21 + 45/21 = 20 + 45/21 = 65/21
5. So, 20/21 + 15/7 = 65/21
   In mixed form: 32/21

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