Answers

Add 84/72 and 84/21

1^st number: 1 12/72, 2^nd number: 4 0/21

84/72 + 84/21 is 31/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   84/72 = 84 × 7/72 × 7 = 588/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   84/21 = 84 × 24/21 × 24 = 2016/504
4. Add the two like fractions:
   588/504 + 2016/504 = 588 + 2016/504 = 2604/504
5. 2604/504 simplified gives 31/6
6. So, 84/72 + 84/21 = 31/6
   In mixed form: 51/6

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