Yikes McTugg bought 1/2 pound of potato salad. He ate 2/3 of it for lunch. How much potato salad was left for afternoon snack?

To find out how much potato salad was left, we need to subtract the amount that Yikes McTugg ate for lunch (2/3) from the total amount he bought (1/2).

First, we need to find a common denominator for 2 and 3, which is 6.

Converting 1/2 to sixths: (1/2) x (3/3) = 3/6

So, Yikes McTugg bought 3/6 pounds of potato salad.

Converting 2/3 to sixths: (2/3) x (2/2) = 4/6

Yikes McTugg ate 4/6 pounds of potato salad for lunch.

To find out how much was left, we subtract: 3/6 - 4/6 = -1/6

Therefore, there was -1/6 (= -0.1667) of a pound of potato salad left for the afternoon snack.