Respuesta :

well, if we take 120 to be the 100%, what is 84 in percentage off of it?

[tex]\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 120&100\\ 84&p \end{array}\implies \cfrac{120}{84}=\cfrac{100}{p}\implies p=\cfrac{84\cdot 100}{120}[/tex]
altavistard
That's 84 out of 120 questions answered correctly.  This ratio is

 84
------ * 100% = 70%.
120

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