At a parade, the ratio of the number of men to the number of women was 20 : 7. If 40% 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 |
20 u |
7 u |
Change |
- 15.8 u |
- 2.8 u |
After |
4.2 u |
4.2 u |
Number of women that left
= 40% x 7 u
=
40100 x 7 u
= 2.8 u
Number of women that remained
= 7 u - 2.8 u
= 4.2 u
Number of men that needed to leave = 20 u - 4.2 u= 15.8 u Percentage of men that must leave = 15.820 x 100% = 79% Answer(s): 79%