What is 12.100888... as a Fraction?

12.1008 equals 272272250 as a fraction.

How do you turn 12.1008 repeating into a fraction?

Detailed Answer:

Step 1: To convert 12.1008 repeating into a fraction, begin writing this simple equation:

n = 12.1008 (equation 1)

Step 2: Notice that there is 1 digit in the repeating block (8) and 3 digits in the non-repeating part (100). Multiply both sides by 10⁴ = 10000.

10000 × n = 121008.8 (equation 2)

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

10000 × n = 121008.8
 1000 × n = 12.1008
 9000 × n = 108908

1089089000 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 = 1089089000 = 108908 ÷ 49000 ÷ 4 = 272272250. So,

12.1008 = 272272250 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 272272250 is also equal to 122272250 when expressed as a mixed number.

The repeating decimal 12.1008 (vinculum notation) has a repeated block length of 1. It is also represented as 12.100888... (ellipsis notation) which equals approximately 12.10088888 (decimal approximation)(*).

The recurring decimal 12.1008 can be written as a ratio of two integers having 27227 as the numerator and 2250 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.