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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. What is the sum of $\frac{1}{3}$, $\frac{4}{3}$ and $\frac{3}{4}$?
  2. 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?
  3. The value of $\frac{4}{3} + \left( \frac{1}{1 + \frac{5}{6}} \right) - \frac{5}{4}$ is
  4. What is the value of 

    $\frac{7}{9} - \frac{11}{12} + \frac{13}{16} - \frac{1}{8}$?

  5. How much does one need to add to $\frac{1}{2}$ to get $2$?
  6. 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.
  7. 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.
  8. Two-fifth of seven-seventeenth of three-fifth of a number is 84. Find 40% of that number.
  9. A beautician's income includes her salary and the tips she gets for her services. During a particular week, if her tips were $\frac{5}{4}$ of her salary, then what fraction of her income came from the tips?
  10. 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?

Important Questions from Fractions

  1. 5 \(\frac{3}{4}\) + x + 2  \(\frac{1}{2}\) = 10  \(\frac{1}{8}\) Find the value of x.

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

  3. Number 0.232323 can be written in rational form as:

  4. Solve: \(\frac{1}{2}\)  [{-2(2 + 3)*20}/2]

  5. Match the following.

    Column I

    Column II

    a.

    Equivalent fraction of \(\frac{7}{12}\)  is  

    i.

    Proper fraction

    b.

    Equivalent fraction of  \(\frac{9}{15}\)  is

    ii.

    Improper fraction

    c.

    \(\frac{7}{11}\)  is

    iii.

    \(\frac{21}{36}\)

    d.

    \(\frac{19}{5}\)  is

    iv.

    \(\frac{3}{5}\)

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