Frank is making salad dressing for a large party. If a serving is 2 1/2 tablespoons, how many servings can he make with 85 tablespoons?

To find the number of servings Frank can make with 85 tablespoons, we need to divide 85 by the serving size of 2 1/2 tablespoons.

First, let's convert 2 1/2 tablespoons to a fraction. We can rewrite this as 5/2 tablespoons.

Next, we can divide 85 tablespoons by 5/2 tablespoons to find the number of servings: 85 / (5/2) = 85 * (2/5) = 170/5 = <<85*(2/5)=34>>34.

Therefore, Frank can make 34 servings of salad dressing.