Use a proportion to solve the problem.
-In baseball, the average number of earned runs given up by a pitcher in 9 innings is the pitcher's earned run average, ERA. For example, if a player gave up 90 earned runs in 250 innings during one year, his ERA is found by solving the proportion $\frac{\text { ERA }}{9}=\frac{90}{250}$. Find the ERA for a player who, in one year, gave up 101 earned runs in 239 innings. Round your answer to the nearest hundredth.
A) 3.80
B) 2.37
C) 21.30
D) 11.22

Question

Quizplus · Accepted Answer

To find the ERA, set up the proportion $\frac{\text{ERA}}{9} = \frac{101}{239}$ and solve for ERA. Multiplying both sides by 9 gives $\text{ERA} = \frac{101}{239} \times 9$, which calculates to approximately 3.80 when rounded to the nearest hundredth.

Use a Proportion to Solve the Problem ERA 9=90250\frac{\text { ERA }}{9}=\frac{90}{250}9 ERA ​=25090​

Use a Proportion to Solve the Problem $\frac{\text { ERA }}{9}=\frac{90}{250}$