Question 925799
maximum you can receive on a test is {{{100}}}%

if there was {{{50}}} questions, each question is worth {{{2}}} not {{{4}}} points

if you received a {{{84}}} on a test, then 

{{{84}}}%={{{84/100}}}
{{{(84/100 )50=0.84*50 = 42}}} correct answers 

therefore {{{50 - 42 = 8}}} incorrect answers 

{{{8}}} incorrect answers, each worth {{{2}}} points gives you a total of {{{16}}} points or

{{{8=(x/100)50}}}

{{{8=5x/10}}}

{{{80=5x}}}

{{{80/5=x}}}

{{{x=16}}}%
 

and {{{84+16=100}}}%