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The percentage of people who like Cricket and hockey both is ______

30.68%

Number of person who are in the Triangle and square both are the person who like cricket and hockey both.

Here, Number of people who like cricket and hockey both = 12 + 15 = 27

Total number of people = 9 + 17 + 15 + 12 + 6 + 21 + 8 = 88

Required percentage = $\frac{27}{88}×100 = 30.68$