I'll give you a question, please answer with step-by-step reasoning process.
There were a total of 50 guests in a movie screening of which half of the guests are women, 15 are men, and the rest are children. In the middle of the movie, 1/5 of the men and 4 children left. How many people stayed?

43
Being women half of the guests, there were 50 / 2 = 25 women in the movie screening.

Adding the 15 men to the number of women guests, there were 25 + 15 = 40 men and women.

From a total of 50 guests, 50 - 40 = 10 were children.

Knowing 1 / 5 of the men left, 15 / 5 = 3 men left.

Thus, 3 men + 4 children = 7 people left in all.

Therefore, 50 - 7 = 43 people stayed.

.

Therefore, the answer is 43