Question

The winner in a vote for class president received 3/4 of the 240 votes. How many votes did the winner receive?

Answer 1

The answer to3/4 of 240 is 180

Answer 2

Now, to solve this, you would need to cross multiply. The equation would look like this...
$\frac{3}{4}$ = $\frac{x}{240}$

After cross multiplying, you would be left with the following. 
4x = 720

All you would have to do now is solve for x. 
$\frac{4x}{4}$ = $\frac{720}{4}$ = 180

The answer would be, the winner for class president received 180 votes. 

I hope this helps!