Vreni raised $250, and this is $\displaystyle \frac{5}{52}$ of the total amount raised.

What is the total amount?

Now the memo tells me the answer is 2600, and it's found by 250 / 5 * 52. But I still don't understand how its worked out. My working is like this:

$\displaystyle \frac{5}{52} = 250$

$\displaystyle \frac{52}{52} = x$

And theeeeeen.... I'm stuck.