<p>I need help with a few math problems that are in my SAT packet.

I just want to how to solve these problems mathematically, besides guess and check.

Thank you very much.</p>

<ol>

<li>If 60 percent of x is equal to y percent of 40, where y > 0, what is the value of x/y</li>

</ol>

<p>A) 2/3

B) 3/4

C) 4/3

D) 3/2

E) 5/3</p>

<ol>

<li>Forty percent of the songs played on a certain mp3 player are 4 minutes long, thirty-five percent of the songs are 3 minutes long, and twenty-five percent of the songs are 2 minutes long. What is the average (arithmetic mean) number of minutes per song played on this mp3 player?</li>

</ol>

<p>A) 3.00

B) 3.05

C) 3.10

D) 3.15

E) 3.20</p>

<ol>

<li>The number of registered voters in City X increased by 18% over last year. There are now 12,803 registered voters. How many registered voters were there last year?</li>

</ol>

<p>A) 10,498

B) 10,850

C) 11,302

D) 14,513

E) 15,613</p>