The probabilities of the top selling menu item in four town's restaurants being different types of vegetarian and non-vegetarian sandwiches are given in the table

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The probabilities of the top-selling menu item in four towns' restaurants being different types of vegetarian and nonvegetarian sandwiches are given in the table. If the restaurant in town 4 has a nonvegetarian sandwich as its top-selling menu item, what is the probability that it is a ham sandwich?
TownVegetable SandwichNonvegetarian Chicken SandwichNonvegetarian Ham SandwichNonvegetarian Bacon SandwichNonvegetarian Tuna Sandwich
Town 16.63%5.42%7.05%6.19%5.91%
Town 26.84%7.11%6.89%5.69%6.58%
Town 35.97%6.63%5.72%5.86%5.79%
Town 46.54%5.86%6.24%6.24%6.33%
Total6.24%5.77%6.03%5.92%6.27%

Then the answer is as follows:

The probability that the restaurant in town 4 has a non-vegetarian sandwich as its top selling menu item is the sum of the probabilities of all the non-vegetarian sandwiches which is 5.86% + 6.24% + 6.24% + 6.33% = 24.67%

The probability that the restaurant in town 4 has ham sandwich as its top selling menu item is 6.24%

Therefore, the probability that the restaurant in town 4 has a non-vegetarian sandwich as its top-selling menu item which is a ham sandwich is given by 6.24 / 24.67 = 0.2529 = 25.29%