Answers

Add 3/63 and 21/20

1^st number: 3/63, 2^nd number: 1 1/20

3/63 + 21/20 is 461/420.

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,
   3/63 = 3 × 20/63 × 20 = 60/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   21/20 = 21 × 63/20 × 63 = 1323/1260
4. Add the two like fractions:
   60/1260 + 1323/1260 = 60 + 1323/1260 = 1383/1260
5. 1383/1260 simplified gives 461/420
6. So, 3/63 + 21/20 = 461/420
   In mixed form: 141/420

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