Answers

Add 25/4 and 5/21

1^st number: 6 1/4, 2^nd number: 5/21

25/4 + 5/21 is 545/84.

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,
   25/4 = 25 × 21/4 × 21 = 525/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   5/21 = 5 × 4/21 × 4 = 20/84
4. Add the two like fractions:
   525/84 + 20/84 = 525 + 20/84 = 545/84
5. So, 25/4 + 5/21 = 545/84
   In mixed form: 641/84

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