Freeflows

School Bus Ratio Analysis

The data in the table below shows the percent of bus riders in a survey of Central H.S. students; 300 males and 300 females in each grade were surveyed. For which grade is the number of its male bus riders closest to $ 135\% $ of the number of its female bus riders? \begin{array}{|l|c|c|}\hline \text{Grade} & \text{Males} & \text{Females} \\ \hline 9^{\mathrm{th}} \ \text{grade} & 41.1\% & 39.4\% \\ \hline 10^{\mathrm{th}} \ \text{grade} & 34.4\% & 33.1\% \\ \hline 11^{\mathrm{th}} \ \text{grade} & 20.6\% & 13.8\% \\ \hline 12^{\mathrm{th}} \ \text{grade} & 11.6\% & 8.6\% \\ \hline \end{array}

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