There can be no numbers with two decimal points in them. So what you are asking about is not a number but simply a string of digits with a couple of full stops thrown in!
8.49107 is a decimal.
That is the decimal form.
0.29 IS in decimal form.
That is decimal form.
That is the decimal form.
That is the decimal form.
That IS the decimal form.
It is in decimal form.
This is in decimal form.
62.5 is in decimal form. If you mean 62.5% then it is 0.625 in decimal form.
100% in decimal form is 1.00. 50% in decimal form is 0.50. Therefore, 82.7% in decimal form is 0.827.
11.25 is already in decimal form. It is a decimal number with two decimal places.
It is already in decimal form.