Answers

Add 72/24 and 84/21

1^st number: 3 0/24, 2^nd number: 4 0/21

72/24 + 84/21 is 7/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 21 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 24 × 7 = 168,
   72/24 = 72 × 7/24 × 7 = 504/168
3. Likewise, for the 2nd fraction, since 21 × 8 = 168,
   84/21 = 84 × 8/21 × 8 = 672/168
4. Add the two like fractions:
   504/168 + 672/168 = 504 + 672/168 = 1176/168
5. 1176/168 simplified gives 7/1
6. So, 72/24 + 84/21 = 7/1

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