4. A third of the kids stayed in the summer camp, while the rest went on an excursion. Those who stayed in the camp ate a quarter of the prepared food for lunch, and those who returned from the excursion in the evening received portions one and a half times larger than those given for lunch. How much food was left for the camp dog Zhuchka?
# Solution

Two-thirds of the children went on an excursion, which is twice as many as those who remained in the camp. If they had received the same portions as they were given for lunch, they would have eaten twice as much as was eaten for lunch, that is, half of the prepared food. Since in reality their portions were one and a half times larger, they ate three-quarters of all the food. And since one-quarter of the food had already been eaten for lunch, nothing was left for the dog.

## Answer: nothing was left.