document.write( "Question 1011558: My average results from the last 4 maths exams was 18 out of 25. What mark do i need in my fifth exam in order to increase the average by 3%? \n" ); document.write( "
Algebra.Com's Answer #627263 by ankor@dixie-net.com(22740)\"\" \"About 
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My average results from the last 4 maths exams was 18 out of 25.
\n" ); document.write( " What mark do i need in my fifth exam in order to increase the average by 3%?
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\n" ); document.write( "Find your average now
\n" ); document.write( "\"18%2F25\" * 100 = 72
\n" ); document.write( "A 3% improvement would be 75
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\n" ); document.write( "At total of five tests
\n" ); document.write( "let x = the grade of the fifth test
\n" ); document.write( "\"%28%284%2872%29%2Bx%29%29%2F5\" = 75
\n" ); document.write( "288 + x = 5(75)
\n" ); document.write( "x = 375 - 288
\n" ); document.write( "x = 87% is the required grade on the fifth test\r
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