In a class full of men and women 3/5 of the class are women.

2 men for every 3 women

Step-by-step explanation:

Q: What is the ratio of men to women?

Given: 3/5 of the class are women.

A full class is 1, or 5/5 => 5/5 = 1

Subtract: 5/5 - 3/5 = 2/5

2/5 of the class are men.

Find the ratio of men to women

For every 2 men, there are 3 women, adding together = 5 in total

step-by-step explanation:

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)