I imagine the part you left off was "how much does he need to fix his bike?" Either how much more, or how much altogether. No matter. We will turn those words into a mathematical expression. "$27 is 45% of how much money?" looks like this: 27=.45x. Divide both sides by .45 to solve for x. x = 60. So he needs 60 total, of which he still needs 60-27 = 33
