Question

(FGV-SP)o valor de (20%)² é???

Answer 1

$\large\begin{array}{l} \mathsf{(20\%)^2}\\\\ =\mathsf{20\%\cdot 20\%}\\\\ =\mathsf{\dfrac{20}{100}\cdot \dfrac{20}{100}}\\\\ =\mathsf{\dfrac{20\cdot 20}{100\cdot 100}}\\\\ =\mathsf{\dfrac{400}{10\,000}} \end{array}$

$\large\begin{array}{l} =\mathsf{\dfrac{4\cdot \;\diagup\!\!\!\!\!\!\! 100}{100\cdot \;\diagup\!\!\!\!\!\!\! 100}}\\\\ =\mathsf{\dfrac{4}{100}}\\\\ =\mathsf{4\%}\quad\longleftarrow\quad\textsf{esta \'e a resposta.} \end{array}$


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$\large\begin{array}{l} \textsf{D\'uvidas? Comente.}\\\\\\ \textsf{Bons estudos! :-)} \end{array}$