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Question

When 0.434343..... is converted into a fraction, then the result will be:

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper PDF (31-Jan-2021) (Shift 1)
The correct answer is
$\frac{43}{99}$

Converting Repeating Decimal to Fraction

To convert the repeating decimal $0.434343...$ into a fraction, follow these steps:

  1. Let the decimal be represented by a variable, for example, $x$. $x = 0.434343...$

  2. Identify the repeating block. The digits '43' repeat. Since there are 2 repeating digits, multiply the equation by $10^2 = 100$. $100x = 100 \times 0.434343...$ $100x = 43.434343...$

  3. Subtract the original equation ($x = 0.434343...$) from the new equation ($100x = 43.434343...$) to eliminate the decimal part. $100x - x = (43.434343...) - (0.434343...)$ $99x = 43$

  4. Solve for $x$ by dividing both sides by 99. $x = \frac{43}{99}$

Therefore, the fraction equivalent of the repeating decimal $0.434343...$ is $\frac{43}{99}$.

Final Result Verification

Comparing the result $\frac{43}{99}$ with the given options, Option 3 matches the calculated fraction.

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