Question

a pitcher gave up 72 earned runs in 162 Innings approximately how many earned runs will he give up in one game 9 Innings

Answer 1

$\bf \begin{array}{ccll} \stackrel{earned}{runs}&innings\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 72&162\\ x&9 \end{array}\implies \cfrac{72}{x}=\cfrac{162}{9}\implies \cfrac{72}{x}=\cfrac{18}{1}\implies \cfrac{72\cdot 1}{18}=x$