What is 1.322857285728572857... as a Fraction?

1.322857 equals 5290939996 as a fraction.

How do you turn 1.322857 repeating into a fraction?

Detailed Answer:

Step 1: To convert 1.322857 repeating into a fraction, begin writing this simple equation:

n = 1.322857 (equation 1)

Step 2: Notice that there are 4 digits in the repeating block (2857) and 2 digits in the non-repeating part (32). Multiply both sides by 10⁶ = 1000000.

1000000 × n = 1322857.2857 (equation 2)

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

1000000 × n = 1322857.2857
    100 × n = 1.322857
 999900 × n = 1322725

1322725999900 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 25 (the GCF - greatest common factor).

n = 1322725999900 = 1322725 ÷ 25999900 ÷ 25 = 5290939996. So,

1.322857 = 5290939996 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 5290939996 is also equal to 11291339996 when expressed as a mixed number.

The repeating decimal 1.322857 (vinculum notation) has a repeated block length of 4. It is also represented as 1.32285728572857... (ellipsis notation) which equals approximately 1.3228572857285728572857 (decimal approximation)(*).

The recurring decimal 1.322857 can be written as a ratio of two integers having 52909 as the numerator and 39996 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.