Question

P= f/a solve this formula for a

Answer 1

$P=f/a$

If we're solving for "a", we need to isolate it onto one side of the equation. To do this, divide by f. 
$P/f=a$

Here's your answer!

Don't fret. It's the same as a normal equation.

Let's say we have 4x=16. You would divide by 4, right? So you'd have x=16/4, which is 4
But instead of 4, let's write a P, and instead of 16, an f. Px=f. If I'm solving for x, all I'd do is divide by P on both sides. x=f/P. See?

Going back to the original equation, P=f/a, to solve for f, you would have to multiply by a.  Your answer would be Pa=f.