Answers

Add 21/84 and 90/5

1^st number: 21/84, 2^nd number: 18 0/5

21/84 + 90/5 is 73/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 5 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   21/84 = 21 × 5/84 × 5 = 105/420
3. Likewise, for the 2nd fraction, since 5 × 84 = 420,
   90/5 = 90 × 84/5 × 84 = 7560/420
4. Add the two like fractions:
   105/420 + 7560/420 = 105 + 7560/420 = 7665/420
5. 7665/420 simplified gives 73/4
6. So, 21/84 + 90/5 = 73/4
   In mixed form: 181/4

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