a)what percentage of the people smoke:
To find this we use the next formula:
% people who smoke = (number of people who smoke/total of people surveyed) *100
Where:
Number of people who smoke = 6+18 = 24
Total of people surveyed = 6+18+16+60 = 100
Replacing on the formula:
% people who smoke = (24/100)*100
Then:
% people who smoke = 24%
b)What percentage of the people do not exercise regularly:
We need to use the next formula:
% people who do not exercise regularly = ( number of people who do not exercise regularly/ total of people surveyed) * 100
Where:
Number of people who do not exercise regularly = 18 + 60 = 78
Replacing on the formula:
% people who do not exercise regularly = ( 78/100)*100
% people who do not exercise regularly = 78%