兄弟姐妹们，谁能帮我解一道题

A toy store’s gross profit on a computer game was 10 percent of the cost of the game.  If the store increased the selling price of the game from $44 to $46 and the cost of the game remained the same, then the store’s gross profit on the game after the price increase was what percent of the cost of the game?

A.     10.5%

B.     11%

C.     12.5%

D.     13%

E.      15%

我是这么做的:

1:profit=10%cost

=> cost=10*profit

2:profit=selling price-cost

profit=44-10*profit

=>profit=4

=>cost=40

3:cost remain the same

=>(46-40)/40=15%

本人做数学题跟写语文作文感觉很像,一来,做不到NN们的一步到位...哎~

不知道对不对...