In a supermarket, ⁵₇ of the customers were male. There were 75 more male customers. Within five minutes, some male customers left the supermarket. As a result, there were ⁵₆ as many female customers as male customers. How many male customers left the supermarket during the five minutes?
Number of male customers = 5 u
Total number of customers = 7 u

Number of female customers
= 7 u - 5 u
= 2 u

5 u - 2 u = 75
3 u = 75

1 u = 75 ÷ 3 = 25

Number of male customers at first
= 5 u
= 5 x 25
= 125

Number of female customers
= 2 u
= 2 x 25
= 50

The number of female customers remains unchanged.
5 p = 50

1 p = 50 ÷ 5 = 10

New number of male customers
= 6 p
= 6 x 10
= 60

Number of male customers who left
= 125 - 60
= 65

Answer(s): 65