Question 834541
66&2/3 percent correctly answered, and therefore 33&1/3 percent wrongly answered.
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7 is 33&1/3 percent of the amount of questions on the quiz.
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{{{7=((33&1/3)/100)N}}}, where N is the number of questions on the quiz.
{{{N=7(100/33&1/3)}}}
{{{N=7(100/(100/3))}}}
{{{N=7*3}}}
{{{highlight(N=21)}}}