## anonymous one year ago Can someone help me figure this out? I thought the average might be percent wise but when I did the problem I got lost.. http://prntscr.com/7e99e0

1. anonymous

@divu.mkr

2. anonymous

@Learner11

3. anonymous

idk sorry

4. anonymous

bating average is something like how many average hit you will make of each throw like as if you were thrown of 4 ball and you were able to hit only one then you bating average will be 0.25 you have just multiply the batting average to the total number of ball to get successful hits

5. anonymous

ooh

6. anonymous

could you explain to me how to set it up?

7. anonymous

@Learner11

8. phi

The idea is to "interpret" this line: batting average is a ratio of hits to times at bat we can write a ratio as a fraction $batting\ avg = \frac{hits}{times\ at\ bat}$

9. phi

Once you get that idea, you read the problem for info. Do we know the batting average (as a number) ? do we know the number of hits or the times at bat? any ideas?

10. anonymous

So I turn the a verage into a fraction and then do proportion?

11. phi

you see the "equation" I posted ? replace the "words" with numbers (as much as you can, from reading the problem) can you do that ?

12. anonymous

Yeah

13. phi

what do you get ?

14. anonymous

.320 = x/25 ?

15. phi

yes. now we need to find "x" (i.e. number of hits) to "solve for x" the trick is to multiply both sides by 25, like this $0.320 \cdot 25 = \frac{x}{25} \cdot 25$

16. anonymous

x=8

17. phi

on the right side the 25/25 is 1 (cancels out)

18. phi

yes, number of hits is expected to be 8

19. anonymous

Would it also work if I turned .320 into a fraction and crossed multiplied?

20. anonymous

with x/25

21. phi

yes, you can cross multiply. you could write 0.320 as 0.320/1 or 320/1000 or 32/100 I remember liking cross multiplying (easy to remember), but it's faster to do it the way I showed (and the way you will learn to solve equations if you take more math classes)

22. anonymous

Oh I see :3 I just asked because that's what I was being taught at the moment. But I understand now ^.^

23. anonymous

Thank you so much c:

24. phi

yw