Answer:
52% of the tickets Nico sold to the movie were adult tickets.
Explanation:
At a theater:
Total number of child tickets sold = 65
Total number of Adult tickets sold = 260
Total number of Senior tickets sold = 175
Now,
total number of tickets sold by Nico = Child tickets + Adult tickets + Senior tickets
= 65 + 260 + 175 = 500
So, in total Nico sold 500 tickets at the theater.
Now,

=

or, Percentage of adult tickets sold = 52%
Hence, 52% of the tickets Nico sold to the movie were adult tickets.