In a supermarket, ⁵₇ of the customers were male. There were 69 more male customers. Within five minutes, some male customers left the supermarket. As a result, there were ²₃ 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 = 69
3 u = 69

1 u = 69 ÷ 3 = 23

Number of male customers at first
= 5 u
= 5 x 23
= 115

Number of female customers
= 2 u
= 2 x 23
= 46

The number of female customers remains unchanged.
2 p = 46

1 p = 46 ÷ 2 = 23

New number of male customers
= 3 p
= 3 x 23
= 69

Number of male customers who left
= 115 - 69
= 46

Answer(s): 46