Answers

Add 18/84 and 8/21

18/84 + 8/21 is 25/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   18/84 = 18 × 1/84 × 1 = 18/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   8/21 = 8 × 4/21 × 4 = 32/84
4. Add the two like fractions:
   18/84 + 32/84 = 18 + 32/84 = 50/84
5. 50/84 simplified gives 25/42
6. So, 18/84 + 8/21 = 25/42

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