What is 30 as a decimal?

To represent 30 as a decimal, you would write it as 30.0 or simply 30.

In decimal form, 30 remains the same without any decimal places as it is already a whole number. It can be written in decimal form with ".0" to show that there are no digits after the decimal point.

So, 30 in decimal form is 30.0 or just 30.