In a mega store, ⁸₁₁ of the customers were female. There were 80 more female customers. Within five minutes, some female customers left the mega store. As a result, there were ²₅ as many male customers as female customers. How many female customers left the mega store during the five minutes?
Number of female customers = 8 u
Total number of customers = 11 u

Number of male customers
= 11 u - 8 u
= 3 u

8 u - 3 u = 80
5 u = 80

1 u = 80 ÷ 5 = 16

Number of female customers at first
= 8 u
= 8 x 16
= 128

Number of male customers
= 3 u
= 3 x 16
= 48

The number of male customers remains unchanged.
2 p = 48

1 p = 48 ÷ 2 = 24

New number of female customers
= 5 p
= 5 x 24
= 120

Number of female customers who left
= 128 - 120
= 8

Answer(s): 8