document.write( "Question 1063615: A $480 TV was put on sale for 30% off. It didn't sell so the price was lowered an additional percent off the sale price making the new price $285.60. What was the second percent discount that was given? \n" ); document.write( "

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Q: A $480 TV was put on sale for 30% off. It didn't sell so the price was lowered an additional percent off the sale price making the new price $285.60. What was the second percent discount that was given?\r
\n" ); document.write( "\n" ); document.write( "Tutorial:
\n" ); document.write( "Let r = second percent discount
\n" ); document.write( "480(1- 0.30)(1 - r) = 285.60
\n" ); document.write( " $\"1+-+r+=+285.60%2F%28480%281-+0.30%29%29\"$
\n" ); document.write( "1 - r = 0.85
\n" ); document.write( "r = 1 - 0.85
\n" ); document.write( "r = 0.15 or 15%
\n" ); document.write( "The second percent discount was 15%.\r
\n" ); document.write( "\n" ); document.write( "Checking: 30% of 480 = 144
\n" ); document.write( "480 less 144 = 336
\n" ); document.write( "15% of 336 = 50.40
\n" ); document.write( "336 less 50.40 = 285.60 (correct)
\n" ); document.write( "The second percent discount rate was 15% \n" ); document.write( "

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