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Question

$1.236576576...$
can be written in the form of:

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
$\frac{123534}{99900}$

Convert Repeating Decimal to Fraction

The question asks to convert the repeating decimal $1.236576576...$ into a fraction. The repeating block is '576'.

Step-by-Step Conversion

  1. Let the number be x. So, $x = 1.236576576...$

  2. Identify the non-repeating part ('23') and the repeating part ('576'). There are 2 digits before the repeating block and 3 digits in the repeating block.

  3. Multiply x by $10^2 = 100$ to move the decimal point just before the repeating block:

    $100x = 123.6576576...$ (Equation 1)

  4. Multiply x by $10^{(2+3)} = 10^5 = 100000$ to move the decimal point to the end of the first repeating block:

    $100000x = 123657.6576576...$ (Equation 2)

  5. Subtract Equation 1 from Equation 2 to eliminate the repeating decimal part:

    $100000x - 100x = 123657.6576576... - 123.6576576...$

    $99900x = 123657 - 123$

    $99900x = 123534$

  6. Solve for x:

    $x = \frac{123534}{99900}$

This result matches option 3.

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Similar Questions

  1. The numerator of a fraction is increased by $20\%$ and the denominator is decreased by $50\%$. If the resultant fraction is $\frac{5}{6}$, then what will be the original fraction?
  2. What smallest fraction should be added to $3\frac{2}{3} + 6\frac{7}{12} + 4\frac{9}{36} + 5 + 7\frac{1}{12}$ to make the sum a whole number?
  3. What is the positive difference between $\frac{5}{16}$ and its reciprocal?
  4. The sum of the numerator and denominator of a fraction is 11. If the numerator is decreased by 1, the fraction becomes $\frac{1}{4}$. Find the fraction.
  5. How much does one need to add to $\frac{1}{2}$ to get $2$?
  6. Solve the following:

    $(0.\overline{5} + 0.\overline{6} + 0.\overline{7} + 0.\overline{8}) = ?$
  7. What is the sum of $\frac{1}{3}$, $\frac{4}{3}$ and $\frac{3}{4}$?
  8. Four persons A, B, C and D completed a task in $\frac{2}{3} \text{ h}, \frac{3}{4} \text{ h}, \frac{4}{5} \text{ h}$ and $\frac{1}{5} \text{ h}$ respectively. Who among the following took the highest amount of time to complete the task?
  9. If the numerator of a fraction is increased by 30% and its denominator is decreased by 35%, the value of the fraction becomes $\frac{3}{15}$. Find the original fraction.
  10. Two-fifth of seven-seventeenth of three-fifth of a number is 84. Find 40% of that number.

Important Questions from Fractions

  1. Which fraction among the following is the least ?

    \(\frac{5}{11}, \frac{7}{12}, \frac{8}{13}, \frac{9}{17}\)

  2. Find the value of the following expression:

    \(\frac{{3 \div 1 \times 2 + 5 - 2}}{{3 \times 3 - 2}}\)

  3. Simplify the expression 441 ÷  \(\left[270 \div \frac{3}{7}+\left(17\div \frac{1}{3}\right)-\left(8\frac{1}{2}-\frac{5}{2}\right)\right]\)

  4. If the sum of two positive numbers is 65 and the square root of their product is 26, then the sum of their reciprocals is:

  5. The value of \(9 \div [\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{6}\div(\frac{3}{4}-\frac{1}{3})\;of\;\frac{2}{9}]\)  is:

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