0,(45)

It seems like you're referring to a number in decimal notation, specifically \(0.445\). In mathematics, a repeating decimal is often expressed with a bar notation over the repeating digits, which in this case could be written as \(0.4\overline{45}\) to indicate that the \(45\) repeats indefinitely.

If you have a specific question or need assistance related to this number or its properties, feel free to ask!