Andy got a 32% discount on all his purchases at his favorite shop. if he saved $64 on the total bill, the bill amount without the discount was $ and he paid $ .

Let x be the value of the his purchases without the discount. The $64 is the value of the 32% discount. 
                                   64 = 0.32x      ; x = 200
Thus, he should have paid $200 if there was no discount. The amount he paid (p) is only 68% of this value. p = (0.68)(200) = 136. Hence, he paid only $136.