Let's assume that the company has 4x women and x men. Then, the total number of people in the company is 4x + x = 5x.
From the given information, we know that the ratio of men to women is 1:3, so we can set up the equation:
x/4x = 1/3
Solving for x, we get:
x = 1/3 * 4x
x = 4/3x
Multiplying both sides by 3/4, we get:
x = 3/4x
So, x represents 4/7 of the total employees in the company, and 3/7 are women.
Now we can calculate the percentage of people under the age of 25:
Number of men under 25 = 0.2x
Number of women under 25 = 0.8(4x/3) = 1.067x
Total number of people under 25 = 0.2x + 1.067x = 1.267x
Therefore, the percentage of people under 25 is:
(1.267x / 5x) * 100% = 25.34%
So, approximately 25.34% of all the people in the company are under the age of 25.