In a wholesaler, ⁵₈ of the customers were male. There were 78 more male customers. Within five minutes, some male customers left the wholesaler. As a result, there were ⁹₁₀ as many female customers as male customers. How many male customers left the wholesaler during the five minutes?
Number of male customers = 5 u
Total number of customers = 8 u

Number of female customers
= 8 u - 5 u
= 3 u

5 u - 3 u = 78
2 u = 78

1 u = 78 ÷ 2 = 39

Number of male customers at first
= 5 u
= 5 x 39
= 195

Number of female customers
= 3 u
= 3 x 39
= 117

The number of female customers remains unchanged.
9 p = 117

1 p = 117 ÷ 9 = 13

New number of male customers
= 10 p
= 10 x 13
= 130

Number of male customers who left
= 195 - 130
= 65

Answer(s): 65