anonymous
  • anonymous
A student raises her grade average from a 75 to 90 what was the percent of increase in the students grade round your answers to the nearest tenth of a percent if NECESSARY A. 20% B. 16.7% C. 8.3% D. 15%
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@Brooklyn_Boiii @Hero @kxttxn @Missiey @ParthKohli @Pawanyadav
anonymous
  • anonymous
look im bad a percentages but i think it's A
anonymous
  • anonymous
@phi

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More answers

phi
  • phi
first, write the fraction: amount of change divided by original amount can you do that ?
anonymous
  • anonymous
um not really
phi
  • phi
what is the change (difference) between 75 and 90 ?
anonymous
  • anonymous
75 is a smaller amount then 90
phi
  • phi
yes, but by how much ?
anonymous
  • anonymous
15
phi
  • phi
yes, the change from 75 to 90 is 15 15 goes in the top of the fraction. The bottom of the fraction is the original amount. What is the original number?
phi
  • phi
the original number is 75 (and then it changes to 90) to find the percent change we write the fraction \[ \frac{15}{75}\]
phi
  • phi
Can you simplify that fraction and change it into a decimal ?
anonymous
  • anonymous
15/75 reduces to 3/25 which is 12% then as a decimal = 0.12 @phi
phi
  • phi
that is the right idea, but your arithmetic is wrong you can divide top and bottom by 3 to get 5/25 then divide top and bottom by 5 to get 1/5 that is 0.2 or 20%
anonymous
  • anonymous
so i was right it's 20%? @phi
anonymous
  • anonymous
or 15%
phi
  • phi
Being "right" means being able to do the problem (not just the final answer) If you are running a race and get to the finish line, it does not count if you used a car. In other words, you really want to know *how to get the 20%* So try hard to learn how to do the problem.
phi
  • phi
simplify 15/75 (you do not get 3/25)
anonymous
  • anonymous
wait ur confusing me what is it 20 or 15 @phi
phi
  • phi
can you simplify 15/75 ?
anonymous
  • anonymous
=0.2 @phi
anonymous
  • anonymous
@tom982 may u tell me
anonymous
  • anonymous
or u @maddie82502 idk if it's 15 or 20
phi
  • phi
yes 0.2 and that is 20%
anonymous
  • anonymous
Yes \(\frac{15}{75}=\frac{1}{5}=0.2\) which, as a percentage, is \(20\)%.
maddie82502
  • maddie82502
I think its 20%
anonymous
  • anonymous
kk thanks guy @maddie i want to fan everybody so can u fan @phi and i fan u and @phi fans @tom982
anonymous
  • anonymous
Oh don't worry about that, I'm not fussed about medals/fans.
anonymous
  • anonymous
oh ok well can u fan me then @maddie82502 idk
maddie82502
  • maddie82502
I fanned everyone
anonymous
  • anonymous
oh ok thanks didnt know u can fan everyone
anonymous
  • anonymous
oh wait im so sorry i ment medals
anonymous
  • anonymous
i medaled u @maddie82502 u should of did @phi and i wont be medaled
maddie82502
  • maddie82502
im srry
anonymous
  • anonymous
it's ok

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