How to find the solution to an equation Practice Test

Sally sells custom picture frames. Her monthly fixed costs are $350. It costs $10 to make each frame. Sally sells her picture frames for $35 each.

To make a profit of $500, how many frames need to be sold?

If a%b = (2b + 3a)/(6ab), what would have a greater value, 2%3 or 3%2?