What is 18.162828... as a Fraction?

18.1628 equals 449532475 as a fraction.

How do you turn 18.1628 repeating into a fraction?

Detailed Answer:

Step 1: To convert 18.1628 repeating into a fraction, begin writing this simple equation:

n = 18.1628 (equation 1)

Step 2: Notice that there are 2 digits in the repeating block (28) and 2 digits in the non-repeating part (16). Multiply both sides by 10⁴ = 10000.

10000 × n = 181628.28 (equation 2)

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

10000 × n = 181628.28
  100 × n = 18.1628
 9900 × n = 179812

1798129900 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 4 (the GCF - greatest common factor).

n = 1798129900 = 179812 ÷ 49900 ÷ 4 = 449532475. So,

18.1628 = 449532475 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 449532475 is also equal to 184032475 when expressed as a mixed number.

The repeating decimal 18.1628 (vinculum notation) has a repeated block length of 2. It is also represented as 18.16282828... (ellipsis notation) which equals approximately 18.162828282828 (decimal approximation)(*).

The recurring decimal 18.1628 can be written as a ratio of two integers having 44953 as the numerator and 2475 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.