Answers

Add 9/84 and 21/27

9/84 + 21/27 is 223/252.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 27 is 756
   
   Next, find the equivalent fraction of both fractional numbers with denominator 756
2. For the 1st fraction, since 84 × 9 = 756,
   9/84 = 9 × 9/84 × 9 = 81/756
3. Likewise, for the 2nd fraction, since 27 × 28 = 756,
   21/27 = 21 × 28/27 × 28 = 588/756
4. Add the two like fractions:
   81/756 + 588/756 = 81 + 588/756 = 669/756
5. 669/756 simplified gives 223/252
6. So, 9/84 + 21/27 = 223/252

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