What is 5.10714285714285714285714285714285714285... as a Fraction?

5.10714285 equals 14328 as a fraction.

How do you turn 5.10714285 repeating into a fraction?

Detailed Answer:

Step 1: To convert 5.10714285 repeating into a fraction, begin writing this simple equation:

n = 5.10714285 (equation 1)

Step 2: Notice that there are 6 digits in the repeating block (714285) and 2 digits in the non-repeating part (10). Multiply both sides by 10⁸ = 100000000.

100000000 × n = 510714285.714285 (equation 2)

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

100000000 × n = 510714285.714285
      100 × n = 5.10714285
 99999900 × n = 510713775

51071377599999900 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 3571425 (the GCF - greatest common factor).

n = 51071377599999900 = 510713775 ÷ 357142599999900 ÷ 3571425 = 14328. So,

5.10714285 = 14328 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 14328 is also equal to 5328 when expressed as a mixed number.

The repeating decimal 5.10714285 (vinculum notation) has a repeated block length of 6. It is also represented as 5.10714285714285714285... (ellipsis notation) which equals approximately 5.10714285714285714285714285714285 (decimal approximation)(*).

The recurring decimal 5.10714285 can be written as a ratio of two integers having 143 as the numerator and 28 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.