John ate 1/2 of pizza for lunch, and he are 1/3 of what was left for dinner. How much pizza did John eat for dinner?

Answer 1

Let X be the amount of pizza John had for lunch.
John ate X/2 for dinner.
John ate X - X/2 = X/2 for dinner. John ate X/2 * 1/3 = X/6 of pizza for dinner. Answer: \boxed{\frac{X}{6}}.