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## lessanchez 2 years ago 20 to 17

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1. smokeydabear

lessanchez, do you think you could clarify on that a little bit? What do you want to figure out?

2. lessanchez

help me with this problem Fifteen of 50 students surveyed said that they favored country music. What percent of the students favored country music?

3. smokeydabear

You put 15 over 50 and convert that into percentage.

4. smokeydabear

Also if you noticed it, 10% of 50 is 5, so 30% of 50 is just 3*5, 15

5. smokeydabear

Percentages have a lot of shortcuts, and noticing them will help you get the answers really quickly.

6. lessanchez

thnxz

7. lessanchez

Find 80% of 25.

8. smokeydabear

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%?

9. lessanchez

idk

10. smokeydabear

Think about it, if 10% is 2.5, to get to 80% we multiply by 8. So now what do you think it is?

11. lessanchez

20 percent i think

12. smokeydabear

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.

13. lessanchez

ok i get i tnow

14. lessanchez

A baseball bat is on sale for \$40.00. It has been discounted at 75%. What was the original price of the bat?

15. smokeydabear

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?

16. lessanchez

so the answer is 60

17. smokeydabear

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.

18. lessanchez

ok

19. smokeydabear

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