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

Question

anonymous · Answer

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

misty1212 · Answer

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

anonymous · Answer

72.5

misty1212 · Answer

hmm not what i get...

anonymous · Answer

32.5

misty1212 · Answer

that is better !

anonymous · Answer

i did it backwards on accident.

misty1212 · Answer

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 
$$32.5\div 115$$

misty1212 · Answer

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

anonymous · Answer

0.300

anonymous · Answer

sorry, im not good at dividing

misty1212 · Answer

maybe rounded a little too much

misty1212 · Answer

i would say perhaps $0.28$

misty1212 · Answer

like i said, use a calculator
you got one?

anonymous · Answer

i did, im not good at rounding either.

misty1212 · Answer

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

misty1212 · Answer

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

anonymous · Answer

yes

misty1212 · Answer

and that is your final answer

misty1212 · Answer

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

anonymous · Answer

Yea that sounds better, but thankyou

misty1212 · Answer

you are quite welcome !

misty1212 · Answer

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

anonymous · Answer

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

misty1212 · Answer

eeeewwwwwww!!

misty1212 · Answer

it pretty gross for sure
i like old ones like reanimator

anonymous · Answer

i will have to look into that!

misty1212 · Answer

definitely
also evil dead if you have never seen it

anonymous · Answer

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

anonymous · Answer

Who's seen sharknado

misty1212 · Answer

not me

anonymous · Answer

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

anonymous · Answer

You gotta watch it you'll love it

anonymous · Answer

@juliastevens have u seen it

anonymous · Answer

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

anonymous · Answer

It's funny isn't it

anonymous · Answer

yes it is!

anonymous · Answer

Did you see the third one?

anonymous · Answer

No i dont think so.

anonymous · Answer

Omg u have to watch that one its soooooooo good