The decimal form of the number 25 is simply 25.0. In the decimal numbering system, the whole number portion is expressed before the decimal point, and if there are no fractional parts, we often include a zero after the decimal point for clarity.
In essence, while we commonly write 25 as a standalone integer, its decimal representation indicates that it stands as a whole number without any additional fractional component. Thus, 25 in decimal form is 25.0, emphasizing its completeness as a whole number.