Asked by evelyn

I have another question.. I think one of my classmates already asked this but.. i dont know how to solve it nor what the answer is.

Mrs. Copeland works at the school 40 hours a week. Before she became a teacher, she used to work at a school 15 hours a week. By what percentage did the hours Mrs. Copeland works increase.

A. 6.25%
B. 8.75%
C. 62.5%
D. 87.5%
Answered by Anonymous
15 hours a week ????? typo ?????
Answered by evelyn
On my question, it says 15 hours..
Answered by oobleck
this was also done for you.
None of the choices is correct
consider how a 50% increase means that 50% is added
So, if 4 grows to 6, then since the actual change is 1/2 of 4, that's a 50% increase. 6/4 = 3/2, so the % increase is 3/2 - 1 = 1/2 = 50%

For this problem, the increase is 25
40/15 = 8/3
8/3 - 1 = 5/3, or 2.67, making a 267% increase
Answered by evelyn
Mr. ¨oobleck¨ I told you I am a classmate of ¨ I need help¨ or whatever his name is
Answered by Anonymous
I bet they mean 35, not 15
Answered by evelyn
Nope. I mean 15.
Answered by evelyn
Over here disliking my comments like ima care LOLL! luh boy or guh must not know that ion really care
Answered by mathhelper
The way I see it:

increase in hours = 40 - 15 = 25
25/15 = 1.6666... = 166.7%

so it increased by 166.7%
or the new hours is 267.7% of the old hours

check:
166.7% of 15 = 25
new hours = 15+25 = 40
or
new hours = 2.666...*(15) = 40

as oobleck noted, none of the choices are correct
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