Answers

Add 7/4 and 84/21

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

7/4 + 84/21 is 23/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 4 × 21 = 84,
   7/4 = 7 × 21/4 × 21 = 147/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   84/21 = 84 × 4/21 × 4 = 336/84
4. Add the two like fractions:
   147/84 + 336/84 = 147 + 336/84 = 483/84
5. 483/84 simplified gives 23/4
6. So, 7/4 + 84/21 = 23/4
   In mixed form: 53/4

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