Question 304663
A dress boutique was trying to sell a formal dress that no one seemed to want. The dress was first marked down by 20% off the original price, but no one bought it. Next, it was marked down 25% more off the first sale price, but still no one would buy it. Finally, it was offered for 30% off the second sale price, and someone purchased it for $63. What was the original price of the dress? 
I tried a couple of approaches. The first one was working backwards, but I did not get the correct answer. 
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$63 = 70% of the previous price
--> $90
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$90 = 75% of the previous price
--> $120
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$120 = 80% of the previous price
---> OP of $150