anonymous
  • anonymous
After a 20% increase, the new price of a radio is $78.00. What was the original price of the radio? a) $15.60 b) $60.00 c) $62.40 d) $65.00 e) $97.50
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
c. 62.4
anonymous
  • anonymous
adila ..please do not just give answers
Psymon
  • Psymon
If the radio is $78.00 after a 20% increase, then this means that $78.00 is 120% of some number. So if you can figure out that calculation, you're golden.

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More answers

anonymous
  • anonymous
The easiest way to do this is by trial and error ..psymon was completely correct a way you can check is take each answer and multiply by 1.2 ...if one is 78 that will be right
anonymous
  • anonymous
ok, great. Let me try to solve it. :) @Psymon
Psymon
  • Psymon
Yeah, sure, try to solve it and lets see what you get ^_^
Psymon
  • Psymon
And trial and error is not needed : )
anonymous
  • anonymous
well its a pretty simple way :P
Psymon
  • Psymon
If you think you got down the method of solving it real well then awesome. Otherwise I can show you how I do it :3
anonymous
  • anonymous
I got 62.4 but I don't think I did it right. :/
Psymon
  • Psymon
Yeah, it shouldnt bethat.
anonymous
  • anonymous
isnt it 65?
Psymon
  • Psymon
So I have a unique way of thinking of it. I do what I would say is a verbal proportion, meaning I put down the numbers based on how I read the sentence. So this is how I set it up: |dw:1378192154570:dw| So let's phrase our question. "78 is 120% of what number?" This is essentially what we're solving. So as I read this "78 is", well, that would be the number I put under "is" in my proportion. Of course 120 fills in the percent category. And "of what number" means I do not know what to put in the of part of my proportion. The 100 on the bottom right always stays there. So that being said, I can plug in all of my numbers and then solve for x by cross-multiplying like so: |dw:1378192263946:dw|
anonymous
  • anonymous
|dw:1378192353416:dw|
Psymon
  • Psymon
Haha, flower, clever xDD
anonymous
  • anonymous
u did all the work so figured i would contribute something artsy :D
anonymous
  • anonymous
haha! Thank you so much to both of you. You both made it so clear. I really appreciate it! :)
Psymon
  • Psymon
Absolutely ^_^
anonymous
  • anonymous
gj psy :D
Psymon
  • Psymon
Thanks, lol.

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