Sam bought 11 pounds of rice for $7 . how many pounds of rice did he get per dollar?

Given:  $7
           
             11 lb

Use this equation of ratios to determine the unit price of a pound of rice:

   $ 7            $1
 =  
11 lb.            x

11 lb             x
 =  
   $7             $1

Cross multiplying, (11 lb)($1) = ($7)x

Divide both sides by $7 to obtain the value of x, the number of pounds of rice per dollar.

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