Answers

Add 21/63 and 84/20

1^st number: 21/63, 2^nd number: 4 4/20

21/63 + 84/20 is 68/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 20 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   21/63 = 21 × 20/63 × 20 = 420/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   84/20 = 84 × 63/20 × 63 = 5292/1260
4. Add the two like fractions:
   420/1260 + 5292/1260 = 420 + 5292/1260 = 5712/1260
5. 5712/1260 simplified gives 68/15
6. So, 21/63 + 84/20 = 68/15
   In mixed form: 48/15

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