document.write( "Question 817888: [ If I have a 76.8 average and my final is worth 25%, how much do I need to get in order to keep at least a 75% average. How do you do the math for this type of problem? ] \n" ); document.write( "

Algebra.Com's Answer #492271 by TimothyLamb(4379) $\"\"$ $\"About$

You can put this solution on YOUR website!
(76.8)(1 - 0.25) + f(0.25) = 75
\n" ); document.write( "(76.8)(0.75) + f(0.25) = 75
\n" ); document.write( "57.6 + f(0.25) = 75
\n" ); document.write( "f(0.25) = 75 - 57.6
\n" ); document.write( "f(0.25) = 17.4
\n" ); document.write( "f = 17.4/(0.25)
\n" ); document.write( "---
\n" ); document.write( "f = 69.6%
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