What is 4.13571571571... as a Fraction?

4.13571 equals 20657949950 as a fraction.

How do you turn 4.13571 repeating into a fraction?

Detailed Answer:

Step 1: To convert 4.13571 repeating into a fraction, begin writing this simple equation:

n = 4.13571 (equation 1)

Step 2: Notice that there are 3 digits in the repeating block (571) and 2 digits in the non-repeating part (13). Multiply both sides by 10⁵ = 100000.

100000 × n = 413571.571 (equation 2)

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

100000 × n = 413571.571
   100 × n = 4.13571
 99900 × n = 413158

41315899900 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 2 (the GCF - greatest common factor).

n = 41315899900 = 413158 ÷ 299900 ÷ 2 = 20657949950. So,

4.13571 = 20657949950 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 20657949950 is also equal to 4677949950 when expressed as a mixed number.

The repeating decimal 4.13571 (vinculum notation) has a repeated block length of 3. It is also represented as 4.13571571571... (ellipsis notation) which equals approximately 4.13571571571571571 (decimal approximation)(*).

The recurring decimal 4.13571 can be written as a ratio of two integers having 206579 as the numerator and 49950 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.