document.write( "Question 1062127: A student scores 90% on a 20 question test. Use a percent equation to write the ratio of the actual number of questions answered correctly to the actual total number of questions. how do i do this?
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Algebra.Com's Answer #676927 by math_helper(2461)\"\" \"About 
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\n" ); document.write( "Let P = the percentage score, expressed as percentage
\n" ); document.write( "Let c = number of correct answers
\n" ); document.write( "Let n = total number of questions\r
\n" ); document.write( "\n" ); document.write( " P = (c/n) * 100\r
\n" ); document.write( "\n" ); document.write( "[ \"Percent\" literally means \"per 100\" so given, say, 90%, you can also write that as 90/100 or 0.90 ]\r
\n" ); document.write( "\n" ); document.write( "In this specific question, number of correct answers = 90% * 20 = 0.90*20 = 18\r
\n" ); document.write( "\n" ); document.write( "So the score 90% = (18/20)*100
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\n" ); document.write( "I hope this makes sense. Just remember that percent is the same as \"per 100\" and that people use it as a convenient way of scoring/measuring/quantifying things. Also, remember that given a value expressed as a percentage (i.e. with the % sign following the number) you can simply divide that number by 100 to convert to a decimal that you can use in your calculations.\r
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