How much is the concentration ratio in the fast food industry if MacDonald's has 18% of the sales;Burger King,12%;Wendy's,10%;Roy Rogers,8%;White Castle,6%;Bob's Big Boy,4%;and four others tie with 3%?

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The Answer of How much is the concentration ratio in the fast food industry if MacDonald's has 18% of the sales;Burger King,12%;Wendy's,10%;Roy Rogers,8%;White Castle,6%;Bob's Big Boy,4%;and four others tie with 3%?

How Much Is the Concentration Ratio in the Fast Food