Answers

Add 70/21 and 90/16

1^st number: 3 7/21, 2^nd number: 5 10/16

70/21 + 90/16 is 215/24.

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,
   70/21 = 70 × 16/21 × 16 = 1120/336
3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
   90/16 = 90 × 21/16 × 21 = 1890/336
4. Add the two like fractions:
   1120/336 + 1890/336 = 1120 + 1890/336 = 3010/336
5. 3010/336 simplified gives 215/24
6. So, 70/21 + 90/16 = 215/24
   In mixed form: 823/24

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