document.write( "Question 600810: if a discount of 25% off the retail price of a desk saves mark $45, how much did he pay for the desk? \n" ); document.write( "

Algebra.Com's Answer #379500 by Rcmathtutor(12) $\"\"$ $\"About$

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We may solve this problem by using proportions.
\n" ); document.write( "The reasoning would go like this: Let X be the original price of the desk. Since the discount was 25%, it means $25 saved per every $100. So, if Mark saved $25 per $100, he saved $45 for how much? Or 25 per 100, 45 per X. The proportion goes:
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\n" ); document.write( "X = 180
\n" ); document.write( "The price of the desk, before the discount, was $180.
\n" ); document.write( "Since Mark got 25% discount, or $45, he paid 180 - 45, or $135. \n" ); document.write( "

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