Answers

Add 63/21 and 12/40

1^st number: 3 0/21, 2^nd number: 12/40

63/21 + 12/40 is 33/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   63/21 = 63 × 40/21 × 40 = 2520/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   12/40 = 12 × 21/40 × 21 = 252/840
4. Add the two like fractions:
   2520/840 + 252/840 = 2520 + 252/840 = 2772/840
5. 2772/840 simplified gives 33/10
6. So, 63/21 + 12/40 = 33/10
   In mixed form: 33/10

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