Question

a new restaurant with 149 seats is being planned. Studies show that 61% of the customers demand a smoke-free area. How many seats should be in the non-smoking are in order to be very sure of having enough seating there?

Answer 1

Of means times
61%=.61
149 x .61= 90.89

therefore  91 seats for the non-smokers
adding at least 4 more seems like a good choice
adding 9 would make a 100 which might be easier in setting up the tables

hope this helps

Answer 2

You would want to have more than 61% of the seats available for a smoke free area.

61% = 0.61     0.61 * 149 = 90.89 or 91 seats to accommodate 61% smoke free customers

To allow for any extra customers in a smoke free area I would figure on 65%

so 65% = 0.65       0.65 * 149 = 96.85  or 97 seats to allow for a few extra for the customers in the smoke free area