Answers

Add 12/63 and 81/60

1^st number: 12/63, 2^nd number: 1 21/60

12/63 + 81/60 is 647/420.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 60 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   12/63 = 12 × 20/63 × 20 = 240/1260
3. Likewise, for the 2nd fraction, since 60 × 21 = 1260,
   81/60 = 81 × 21/60 × 21 = 1701/1260
4. Add the two like fractions:
   240/1260 + 1701/1260 = 240 + 1701/1260 = 1941/1260
5. 1941/1260 simplified gives 647/420
6. So, 12/63 + 81/60 = 647/420
   In mixed form: 1227/420

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