Hi Humblelearner. That's a good start; keep going.
Continue, by using the distributive property to multiply everything you can (that is, get rid of the grouping symbols). If you're not sure what that means, let us know.
Next, move all the variable terms (terms containing p) to one side, and move all the constants to the other side. Then, combine like-terms. At that point, there's one more step, to solve for p. What answer do you get?
By the way, in your last line above, we don't need to write those grouping symbols around the term 275000000·p or around the expression 176000000(1-p).
?