What is 5.127333... as a Fraction?

5.1273 equals 76911500 as a fraction.

How do you turn 5.1273 repeating into a fraction?

Detailed Answer:

Step 1: To convert 5.1273 repeating into a fraction, begin writing this simple equation:

n = 5.1273 (equation 1)

Step 2: Notice that there is 1 digit in the repeating block (3) and 3 digits in the non-repeating part (127). Multiply both sides by 10⁴ = 10000.

10000 × n = 51273.3 (equation 2)

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

10000 × n = 51273.3
 1000 × n = 5.1273
 9000 × n = 46146

461469000 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 6 (the GCF - greatest common factor).

n = 461469000 = 46146 ÷ 69000 ÷ 6 = 76911500. So,

5.1273 = 76911500 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 76911500 is also equal to 51911500 when expressed as a mixed number.

The repeating decimal 5.1273 (vinculum notation) has a repeated block length of 1. It is also represented as 5.127333... (ellipsis notation) which equals approximately 5.12733333 (decimal approximation)(*).

The recurring decimal 5.1273 can be written as a ratio of two integers having 7691 as the numerator and 1500 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.