A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So the decimal representation of 800 is 800, exactly as in the question. However, if you msut have a decimal point you could write is as 800. but without any trailing zeros since they would imply a higher level of precision for which there is no justification.
80.0
8.00
0.00008
0.8
1000 1000s is 1,000,000 There is no need for a decimal point.
800 in decimal form = 800.0
800% = 80,000
80.0
As 800 is a whole number (as shown in the question) then: 800.00
800,000.00
8.00
0.00008
0.8
800.005
1000 1000s is 1,000,000 There is no need for a decimal point.
800%= 8.0 in decimal
decimal part of 800 is 160 = 0.2160/800:= 1/5= 0.2 in decimal