Answers

Add 63/21 and 90/16

1^st number: 3 0/21, 2^nd number: 5 10/16

63/21 + 90/16 is 69/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 16 is 336
   
   Next, find the equivalent fraction of both fractional numbers with denominator 336
2. For the 1st fraction, since 21 × 16 = 336,
   63/21 = 63 × 16/21 × 16 = 1008/336
3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
   90/16 = 90 × 21/16 × 21 = 1890/336
4. Add the two like fractions:
   1008/336 + 1890/336 = 1008 + 1890/336 = 2898/336
5. 2898/336 simplified gives 69/8
6. So, 63/21 + 90/16 = 69/8
   In mixed form: 85/8

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