In a mega store, ⁵₇ of the customers were male. There were 90 more male customers. Within five minutes, some male customers left the mega store. As a result, there were ⁵₇ as many female customers as male customers. How many male customers left the mega store 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 = 90
3 u = 90

1 u = 90 ÷ 3 = 30

Number of male customers at first
= 5 u
= 5 x 30
= 150

Number of female customers
= 2 u
= 2 x 30
= 60

The number of female customers remains unchanged.
5 p = 60

1 p = 60 ÷ 5 = 12

New number of male customers
= 7 p
= 7 x 12
= 84

Number of male customers who left
= 150 - 84
= 66

Answer(s): 66