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anonymous

  • 5 years ago

81 is 120% of what number?

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  1. anonymous
    • 5 years ago
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    17.220 = 17.22

  2. anonymous
    • 5 years ago
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    how did you get that?

  3. anonymous
    • 5 years ago
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    amu12, here is an easy way to think of percentage questions and fractions. Whenever you see the word "of" think of multiplication. So, 50% of 100 is, 50% * 100, which is 50. So, to answer your question, 120% of ? = 81 is written as 120% * ? = 81 we can also write it as 120/100 * ? = 81 Now, let's simplify it, 1.2 * ? = 81 In algebra to find an answer, we have to isolate the unknown right? So we have to isolate the question mark... how do we do that? We do that by moving 1.2 to the other side. We end up with ? = 81/2.1 so, we do some easy division, and we find the answer is 67.5 And you can check your work by plugging it back in. Good luck!

  4. anonymous
    • 5 years ago
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    i multiplyed .820 by 21

  5. anonymous
    • 5 years ago
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    beacuse ure finding 820%

  6. anonymous
    • 5 years ago
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    still how do you do it? i dont get it ......

  7. anonymous
    • 5 years ago
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    ok so

  8. anonymous
    • 5 years ago
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    That is actually incorrect, Hermella. They are not asking for 820% of 21, they are asking for what number multiply by 120% gives you 82. And 820% is not .82, it is 8.2 Please look at my post for detailed explanation, amu

  9. anonymous
    • 5 years ago
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    you are finding 820% so you multiply .825 by 21 because it is 825% of 21

  10. anonymous
    • 5 years ago
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    get it

  11. anonymous
    • 5 years ago
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    ??????

  12. anonymous
    • 5 years ago
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    so what don't you get

  13. anonymous
    • 5 years ago
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    amu what dont you get

  14. anonymous
    • 5 years ago
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    so i am still not getting how to solve it.....!!! ????

  15. anonymous
    • 5 years ago
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    btw im still on

  16. anonymous
    • 5 years ago
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    amu

  17. anonymous
    • 5 years ago
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    yea so how exactly did you do it

  18. anonymous
    • 5 years ago
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    i multiplyed .820 by 21

  19. anonymous
    • 5 years ago
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    get it

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