anonymous
  • anonymous
20 to 17
Pre-Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
lessanchez, do you think you could clarify on that a little bit? What do you want to figure out?
anonymous
  • anonymous
help me with this problem Fifteen of 50 students surveyed said that they favored country music. What percent of the students favored country music?
anonymous
  • anonymous
You put 15 over 50 and convert that into percentage.

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anonymous
  • anonymous
Also if you noticed it, 10% of 50 is 5, so 30% of 50 is just 3*5, 15
anonymous
  • anonymous
Percentages have a lot of shortcuts, and noticing them will help you get the answers really quickly.
anonymous
  • anonymous
thnxz
anonymous
  • anonymous
Find 80% of 25.
anonymous
  • anonymous
I want you to try this one with just a nudge from me. If 10% of 25 is 2.5, how do we get to 80%?
anonymous
  • anonymous
idk
anonymous
  • anonymous
Think about it, if 10% is 2.5, to get to 80% we multiply by 8. So now what do you think it is?
anonymous
  • anonymous
20 percent i think
anonymous
  • anonymous
Not "percent", but the answer is 20. You could have also done it backwards, and figured out the difference between 80% and 100%, since we know that 100% is equal to 25. The difference in percent is 20%, and 10% we know is equal to 2.5, so 2 times that is 5. 25-5=20, which is the same as what you got, but with smaller numbers.
anonymous
  • anonymous
ok i get i tnow
anonymous
  • anonymous
A baseball bat is on sale for $40.00. It has been discounted at 75%. What was the original price of the bat?
anonymous
  • anonymous
We now have the opposite information, so we want to work backwards. 75% is equal to 40, and we need 25% more to reach the full number. That 25% is also equal to 1/3 of 40, because 25/75=1/3. So to find the full number, we need to find 1/3 of 40, and add that to 40. Does that make sense?
anonymous
  • anonymous
so the answer is 60
anonymous
  • anonymous
It can't be 60, because 40 is not 75% of 60 (it is actually 67%). Find 1/3 of 40, and add it to 40.
anonymous
  • anonymous
ok
anonymous
  • anonymous
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