Answers

Add 72/21 and 24/36

1^st number: 3 9/21, 2^nd number: 24/36

72/21 + 24/36 is 86/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 36 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 21 × 12 = 252,
   72/21 = 72 × 12/21 × 12 = 864/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   24/36 = 24 × 7/36 × 7 = 168/252
4. Add the two like fractions:
   864/252 + 168/252 = 864 + 168/252 = 1032/252
5. 1032/252 simplified gives 86/21
6. So, 72/21 + 24/36 = 86/21
   In mixed form: 42/21

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