How do they figure out earned run average?

Question

How do they figure out earned run average?

Answer 1

Yes the people above me are right (with the exception to the 1)

But if you want a more acurate answer:

27 X  # of ER / # of outs recorded

Answer 2

http://en.wikipedia.org/wiki/Earned_run_...

Answer 3

they divide the number of Earned Runs by the number of innings pitched

Answer 4

One way to calculate ERA is to add the number of innings pitched and divide them by 9.  Add the total earned runs and divide that number the above.  The result is the earned run average.

ER / (IP / 9)

So if a pitcher throws 7 innings and gives up 1 ER in a game, his ERA for that game is 1.28.  (7 divided by 9 equals .777; 1 divided by .777 equals 1.28.)

***Incidentally, if a pitcher throws "6.1", or "6.2" innings (meaning he pitched one or two outs into the 7th inning), this means he threw 6.33, or 6.67 innings.  

Another way to calculate ERA is to multiply the total earned runs by 9, and to divide that number by the total innings pitched.  

(ER x 9) / IP  

So if a pitcher throws 5.2 innings and gives up 3 earned runs in a game, his ERA is 4.76.  (3 times 9 equals 27, divided by 5.67 equals 4.76.)

Answer 5

9 x (# of earned runs given up)/(# of innings pitched)

Answer 6

you times the number of runs given up by 9 then divide by the number of innings pitched

Answer 7

thats right

EDIT: the guy below me is wong