What is 0.17142871428714287142871428... as a Fraction?

0.171428 equals 171427999990 as a fraction.

How do you turn 0.171428 repeating into a fraction?

Detailed Answer:

Step 1: To convert 0.171428 repeating into a fraction, begin writing this simple equation:

n = 0.171428 (equation 1)

Step 2: Notice that there are 5 digits in the repeating block (71428) and 1 digit in the non-repeating part (1). Multiply both sides by 10⁶ = 1000000.

1000000 × n = 171428.71428 (equation 2)

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

1000000 × n = 171428.71428
     10 × n = 0.171428
 999990 × n = 171427

n = 171427999990 (answer)

0.171428 = 171427999990 as the lowest possible fraction.

The repeating decimal 0.171428 (vinculum notation) has a repeated block length of 5. It is also represented as 0.1714287142871428... (ellipsis notation) which equals approximately 0.17142871428714287142871428 (decimal approximation)(*).

The recurring decimal 0.171428 can be written as a ratio of two integers having 171427 as the numerator and 999990 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.