At a parade, the ratio of the number of men to the number of women was 7 : 5. If 30% of the women left, what percentage of the men must leave so that there will be an equal number of men and women remaining?
|
Men |
Women |
Before |
7 u |
5 u |
Change |
- 3.5 u |
- 1.5 u |
After |
3.5 u |
3.5 u |
Number of women that left
= 30% x 5 u
=
30100 x 5 u
= 1.5 u
Number of women that remained
= 5 u - 1.5 u
= 3.5 u
Number of men that needed to leave = 7 u - 3.5 u= 3.5 u Percentage of men that must leave = 3.57 x 100% = 50% Answer(s): 50%