Answers

Add 50/21 and 90/16

1^st number: 2 8/21, 2^nd number: 5 10/16

50/21 + 90/16 is 1345/168.

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,
   50/21 = 50 × 16/21 × 16 = 800/336
3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
   90/16 = 90 × 21/16 × 21 = 1890/336
4. Add the two like fractions:
   800/336 + 1890/336 = 800 + 1890/336 = 2690/336
5. 2690/336 simplified gives 1345/168
6. So, 50/21 + 90/16 = 1345/168
   In mixed form: 81/168

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