0.218181818.... To calculate this result, follow these steps:
Write 12 as 12.00000.
Divide 12 by 55. The result is 0 with the remainder 12.
Copy the decimal point in the result.
Prepend 12 to 0 and find 120. Divide 120 by 55: the result is 2 with the remainder 10.
Prepend 10 to 0, take the result 100, and divide by 55. The result is 1 with remainder 45.
The next number we divide will be 450. 450/55 = 8 with remainder 10.
We've already met this remainder: the digits 1 and 8 repeat infinitely.
The result is: 12/55 = 0.2181818... Read more