First, you would need to create an equation for this problem. Let x represent the unknown percentage.
[tex] \frac{17}{25} [/tex] = [tex] \frac{x}{100} [/tex]
Next, you would cross multiply.
25x = 1,700
Now, all you would have to do is isolate the x. To do this, you would divide both sides by 25.
x = 68%
17 is 68% of 25.
I hope this helps!