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JokerSmart

  • one year ago

___ What is 0.12 expressed as the quotient of two integers in simplest form?

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  1. JokerSmart
    • one year ago
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    \[\frac{ 3 }{ 25 }\] I believe.

  2. mathstudent55
    • one year ago
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    This is how I learned to find a fraction for a repeating, non-terminating decimal. I'll show it to you step by step.

  3. JokerSmart
    • one year ago
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    Thank you for taking the time to help me out. ^_^

  4. mathstudent55
    • one year ago
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    Call the number x, and write the number leaving space above it, like this: |dw:1432836892783:dw|

  5. mathstudent55
    • one year ago
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    Sorry, it's better like this, leaving room to the left of the number, too. |dw:1432836947882:dw|

  6. mathstudent55
    • one year ago
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    Since there are 2 repeating decimal places, 0.1212..., we need 10^2. You always use 10 to the power that is the number off repeating decimals. 10^2 = 100, so we multiply both sides by 100 and write the new equation above the original equation: |dw:1432837075824:dw|

  7. mathstudent55
    • one year ago
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    Do you follow so far?

  8. JokerSmart
    • one year ago
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    Ah that's right! I think I have something similar like that in my notes.

  9. mathstudent55
    • one year ago
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    Now you subtract the bottom equation from the top equation, like this: |dw:1432837224992:dw|

  10. mathstudent55
    • one year ago
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    Since 99x = 12, we simply divide both sides by 99 and reduce. |dw:1432837294475:dw|

  11. mathstudent55
    • one year ago
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    The answer is \(\dfrac{4}{33} \)

  12. JokerSmart
    • one year ago
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    So 12.121212 - 0.121212 = 12 I see. Ah thank you so much. I should probably write this down for future reference. xD I appreciate your help! I as a bit off from the answer, haha

  13. mathstudent55
    • one year ago
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    Now notice why your answer above is incorrect. |dw:1432837370538:dw|

  14. JokerSmart
    • one year ago
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    Yeah, I missed something around there.

  15. mathstudent55
    • one year ago
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    Your answer was for the terminating, non-repeating decimal 0.12 The question is about the repeating, non-terminating decimal 0.121212... They are different numbers. The non-terminating one is a little larger than the terminating one.

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