document.write( "Question 549371: you missed 3 problems on a test and got 93%. How many problems were on the test? \n" ); document.write( "
Algebra.Com's Answer #357692 by TutorDelphia(193)![]() ![]() You can put this solution on YOUR website! Percent formula is \n" ); document.write( "part/whole=percent/100\r \n" ); document.write( "\n" ); document.write( "we know the part and the percent, but not the whole. The 3 questions must have been 7% of the test 100%-93%=7%\r \n" ); document.write( "\n" ); document.write( "3/x=7/100 or 3/x=7% or 3/x=.07 depending on how you want to write it.\r \n" ); document.write( "\n" ); document.write( "multiply both sides by x and we get 3=.07x\r \n" ); document.write( "\n" ); document.write( "divide both sides by .93 and we get 3/.07=x\r \n" ); document.write( "\n" ); document.write( "So we'd get 42.9 which we can round off to 43. \r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |