What is 0.81616161616... as a Fraction?

0.816 equals 404495 as a fraction.

How do you turn 0.816 repeating into a fraction?

Detailed Answer:

Step 1: To convert 0.816 repeating into a fraction, begin writing this simple equation:

n = 0.816 (equation 1)

Step 2: Notice that there are 2 digits in the repeating block (16) and 1 digit in the non-repeating part (8). Multiply both sides by 10³ = 1000.

1000 × n = 816.16 (equation 2)

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

1000 × n = 816.16
  10 × n = 0.816
 990 × n = 808

808990 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 2 (the GCF - greatest common factor).

n = 808990 = 808 ÷ 2990 ÷ 2 = 404495. So,

0.816 = 404495 as the lowest possible fraction.

The repeating decimal 0.816 (vinculum notation) has a repeated block length of 2. It is also represented as 0.8161616... (ellipsis notation) which equals approximately 0.81616161616 (decimal approximation)(*).

The recurring decimal 0.816 can be written as a ratio of two integers having 404 as the numerator and 495 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.