Question

the tennis team is selling tickets to a car wash for 6 dollars when they do not sell very many tickets the team decrease the price 25% what is the new cost of a ticket

Answer 1

For this case what you must do is the following rule of three:
6 $ ---> 100%
x -----> 25%
Clearing x we have:
x = (25/100) * (6)
x = 1.5 $
Then, the new cost will be
6 $ -1.5 $ = 4.5 $
Answer:
the new cost of a ticket is 4.5 $