You can put this solution on YOUR website! Set up a proportion. Let x = the pounds of sugar he got per dollar. Set it up like this:
Cross multiply 1 and 11 to get 11. Now divide 11 by 7 to get 1.57142857... but let's round that to 1.57.
Thus, Kareem got about 1.57 pounds per dollar.
Hope I helped.
Please, feel free to tell me if you have any questions.