Answers

Add 60/63 and 21/20

1^st number: 60/63, 2^nd number: 1 1/20

60/63 + 21/20 is 841/420.

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,
   60/63 = 60 × 20/63 × 20 = 1200/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   21/20 = 21 × 63/20 × 63 = 1323/1260
4. Add the two like fractions:
   1200/1260 + 1323/1260 = 1200 + 1323/1260 = 2523/1260
5. 2523/1260 simplified gives 841/420
6. So, 60/63 + 21/20 = 841/420
   In mixed form: 21/420

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