What is 0.10142857142857142857142857142857142857142857... as a Fraction?

0.10142857 equals 71700 as a fraction.

How do you turn 0.10142857 repeating into a fraction?

Detailed Answer:

Step 1: To convert 0.10142857 repeating into a fraction, begin writing this simple equation:

n = 0.10142857 (equation 1)

Step 2: Notice that there are 6 digits in the repeating block (142857) and 2 digits in the non-repeating part (10). Multiply both sides by 10⁸ = 100000000.

100000000 × n = 10142857.142857 (equation 2)

Step 3: Now subtract equation 1 from equation 2 to cancel the repeating block (or repetend) out.

100000000 × n = 10142857.142857
      100 × n = 0.10142857
 99999900 × n = 10142847

1014284799999900 could be the answer, but it still can be put in the simplest form, i.e., reduced.

To simplify this fraction, divide the numerator and denominator by 142857 (the GCF - greatest common factor).

n = 1014284799999900 = 10142847 ÷ 14285799999900 ÷ 142857 = 71700. So,

0.10142857 = 71700 as the lowest possible fraction.

The repeating decimal 0.10142857 (vinculum notation) has a repeated block length of 6. It is also represented as 0.10142857142857142857... (ellipsis notation) which equals approximately 0.10142857142857142857142857142857 (decimal approximation)(*).

The recurring decimal 0.10142857 can be written as a ratio of two integers having 71 as the numerator and 700 as the denominator. So, it is a rational number (named after ratio). It can be shown that a number is rational if its decimal representation is repeating or terminating.

(*) At present, there is no single universally accepted notation or phrasing for repeating decimals.