What is 0.121616... as a Fraction?

0.1216 equals 3012475 as a fraction.

How do you turn 0.1216 repeating into a fraction?

Detailed Answer:

Step 1: To convert 0.1216 repeating into a fraction, begin writing this simple equation:

n = 0.1216 (equation 1)

Step 2: Notice that there are 2 digits in the repeating block (16) and 2 digits in the non-repeating part (12). Multiply both sides by 10⁴ = 10000.

10000 × n = 1216.16 (equation 2)

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

10000 × n = 1216.16
  100 × n = 0.1216
 9900 × n = 1204

12049900 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 = 12049900 = 1204 ÷ 49900 ÷ 4 = 3012475. So,

0.1216 = 3012475 as the lowest possible fraction.

The repeating decimal 0.1216 (vinculum notation) has a repeated block length of 2. It is also represented as 0.12161616... (ellipsis notation) which equals approximately 0.121616161616 (decimal approximation)(*).

The recurring decimal 0.1216 can be written as a ratio of two integers having 301 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.