At the ferry transit terminal, 87.5% of the passengers were male and the rest were female. After 80 female passengers entered the terminal, the percentage of the number of female passengers became 75%. Find the number of female passengers at the terminal at first.
|
Male |
Female |
Before |
7x1 = 7 u |
1x1 = 1 u |
Change |
No change |
+ 80 |
After |
1x7 = 7 u |
3x7 = 21 u |
87.5% =
8751000 =
7875% =
75100 =
34The number of male passengers at first and in the end remains unchanged. Make the number of male passengers the same. LCM of 7 and 1 is 7.
Number of female passengers who entered the terminal
= 21 u - 1 u
= 20 u
20 u = 80
1 u = 80 ÷ 20 = 4
Number of female passengers at the terminal at first
= 1 u
= 1 x 4
= 4
Answer(s): 4