Answers

Add 2/4 and 63/21

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

2/4 + 63/21 is 7/2.

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,
   2/4 = 2 × 21/4 × 21 = 42/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   63/21 = 63 × 4/21 × 4 = 252/84
4. Add the two like fractions:
   42/84 + 252/84 = 42 + 252/84 = 294/84
5. 294/84 simplified gives 7/2
6. So, 2/4 + 63/21 = 7/2
   In mixed form: 31/2

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