Answers

Add 84/21 and 45/84

1^st number: 4 0/21, 2^nd number: 45/84

84/21 + 45/84 is 127/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 84 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   84/21 = 84 × 4/21 × 4 = 336/84
3. Likewise, for the 2nd fraction, since 84 × 1 = 84,
   45/84 = 45 × 1/84 × 1 = 45/84
4. Add the two like fractions:
   336/84 + 45/84 = 336 + 45/84 = 381/84
5. 381/84 simplified gives 127/28
6. So, 84/21 + 45/84 = 127/28
   In mixed form: 415/28

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