## anonymous one year ago Erika calculated that she would spend $115 on school supplies this year. She actually spent$82.50 on school supplies. What is Erika’s percent of error

1. anonymous

i worked this one out and still could not figure it out.

2. misty1212

ok two steps for this question the first think you need is the actual error, not the percent in other words $115-82.50$

3. anonymous

72.5

4. misty1212

hmm not what i get...

5. anonymous

32.5

6. misty1212

that is better !

7. anonymous

i did it backwards on accident.

8. misty1212

then compare to the original amount by division which is a complicated way of saying compute $\frac{32.5}{115}$or on a calculator do $32.5\div 115$

9. misty1212

you get a rather long decimal, so round a little what do you get?

10. anonymous

0.300

11. anonymous

sorry, im not good at dividing

12. misty1212

maybe rounded a little too much

13. misty1212

i would say perhaps $$0.28$$

14. misty1212

like i said, use a calculator you got one?

15. anonymous

i did, im not good at rounding either.

16. misty1212

actually i am being silly if you are on a computer, do not bother with a calculator, use this http://www.wolframalpha.com/input/?i=32.5%2F115

17. misty1212

you can see that you get about $$0.28$$ which, as a percent, is $$28\%$$

18. anonymous

yes

19. misty1212

20. misty1212

if you are going to round for percents, probably good to round to two places at least

21. anonymous

Yea that sounds better, but thankyou

22. misty1212

you are quite welcome !

23. misty1212

now i have a question what is your favorite horror movie?

24. anonymous

oh my favorite horror movie would have to be the human centipede

25. misty1212

eeeewwwwwww!!

26. misty1212

it pretty gross for sure i like old ones like reanimator

27. anonymous

i will have to look into that!

28. misty1212

definitely also evil dead if you have never seen it

29. anonymous

Nope i have not, that will definitely be on my movies to watch list.

30. anonymous

31. misty1212

not me

32. anonymous

It's not a real horror movie but it's really funny and kinda horror ish

33. anonymous

You gotta watch it you'll love it

34. anonymous

@juliastevens have u seen it

35. anonymous

actually i have, i watched it when shark week was on tv.

36. anonymous

It's funny isn't it

37. anonymous

yes it is!

38. anonymous

Did you see the third one?

39. anonymous

No i dont think so.

40. anonymous

Omg u have to watch that one its soooooooo good