What is 20.13285285285... as a Fraction?

20.13285 equals 1676068325 as a fraction.

How do you turn 20.13285 repeating into a fraction?

Detailed Answer:

Step 1: To convert 20.13285 repeating into a fraction, begin writing this simple equation:

n = 20.13285 (equation 1)

Step 2: Notice that there are 3 digits in the repeating block (285) and 2 digits in the non-repeating part (13). Multiply both sides by 10⁵ = 100000.

100000 × n = 2013285.285 (equation 2)

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

100000 × n = 2013285.285
   100 × n = 20.13285
 99900 × n = 2011272

201127299900 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 12 (the GCF - greatest common factor).

n = 201127299900 = 2011272 ÷ 1299900 ÷ 12 = 1676068325. So,

20.13285 = 1676068325 as the lowest possible fraction.

As the numerator is greater than the denominator, we have an improper fraction, so we can also express it as a mixed number, thus 1676068325 is also equal to 2011068325 when expressed as a mixed number.

The repeating decimal 20.13285 (vinculum notation) has a repeated block length of 3. It is also represented as 20.13285285285... (ellipsis notation) which equals approximately 20.13285285285285285 (decimal approximation)(*).

The recurring decimal 20.13285 can be written as a ratio of two integers having 167606 as the numerator and 8325 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.