Question

1) On average, Donna's Cafe has 42 customers, which represents 20% of the total approved occupancy by the fire department.

Answer 1

Given that Donna's Cafe has 42 customers representing 20% of the total approved occupancy by the fire department.

a.) According to the fire department's occupancy approval, the percentage of the cafe still available for customers is 100% - 20% = 80%


b.) Given that 42 customers represent 20% of the total approved occupancy by the fire department.
Let the total approved occupancy be x, then 20% of x is 42
i.e.
$0.2x=42 \\ \\ x= \frac{42}{0.2} =210$
i.e. the total approved occupancy is 210.

According to the fire department, the number of seats that are still available for customers is given by
$80\% \ of \ x = 0.8 \times 210 = 168$