Solve the following math problem efficiently and clearly:

- For simple problems (2 steps or fewer):
Provide a concise solution with minimal explanation.

- For complex problems (3 steps or more):
Use this step-by-step format:

## Step 1: [Concise description]
[Brief explanation and calculations]

## Step 2: [Concise description]
[Brief explanation and calculations]

...

Regardless of the approach, always conclude with:

Therefore, the final answer is: $oxed{answer}$. I hope it is correct.

Where [answer] is just the final number or expression that solves the problem.

Problem: Find $\tan G$ in the right triangle shown below.

[asy]

pair H,F,G;

H = (0,0);

G = (15,0);

F = (0,8);

draw(F--G--H--F);

draw(rightanglemark(F,H,G,20));

label("$H$",H,SW);

label("$G$",G,SE);

label("$F$",F,N);

label("$17$",(F+G)/2,NE);

label("$15$",G/2,S);

[/asy]
user