Question

ramon correctly answered 80% of the questions on his math test. which of the following does NOT represent the part of the questions Ramon answered correctly?12/150.8028/3534/40

Answer 1

Notice that 80% is equivalent to

$\begin{gathered} 80\%=\frac{80}{100}=0.80 \\ and \\ \frac{80}{100}=\frac{8*10}{10*10}=\frac{8}{10}=\frac{4}{5} \\ and \\ \frac{4}{5}*\frac{3}{3}=\frac{12}{15} \\ \frac{4}{5}*\frac{7}{7}=\frac{28}{35} \\ but \\ \frac{34}{40}=\frac{17}{20}\ne\frac{4}{5} \end{gathered}$

Therefore, the answer is 34/40