Apolling company reported that 43% of 2286 adults said that they play football.
what is the exact value?
what could be the actual number who said they play football?
among the 2286 respondents 192 said the only play hockey.
what percentage of respondents said they only play hockey?

There are 2286 respondents. The 43% meant that out of 100 people there are 43 who plays football. So for the basis of 2286, there are 982.98 people who plays football. That's 0.43(2286). Since we are talking about people and there is no 0.98 person, we have to round down. So there are 982 people who plays football. 

(192/2286)*100 = 8.4% plays hockey.