I presume by hexa you mean hexadecimal, which is base 16. A hexadecimal number can be considered a polynomial in a variable whose value is 16, the coefficients being whole numbers ranging from 0 to 15. The hexadecimal digits after 9 are usually written as the letters A through F (sometimes in lower case); A means 10, B means 11, and so on. Just plug in 16 for the variable and evaluate the polynomial. For example, consider the hexadecimal number 3E7. The 7 is in the units place, the E, meaning 14, is in the 16's place, and the 3 is in the 162 (256) place. So the value of this number, in decimal, is 3 x 256 + 14 x 16 + 7, which works out to be 999 (so help me, I picked those digits at random!).
That can't be an octal number; it has an 8 in it.
0xFFEF + 1 = 0xFFF0.
The answer will depend on what you want to convert into a decimal number.
multiply the decimal by 100 to convert it into a percent.
The answer depends on what you wish to convert to a decimal. The smell of a lemon you cannot.
It is C
That can't be an octal number; it has an 8 in it.
(159)decimal = (9F)HEX
0xFFEF + 1 = 0xFFF0.
You cannot convert a decimal into a decimal!
0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.0.2 already is a decimal. There is nothing to convert.
Convert 29.53 to decimal
You don't use binary because it's very hard reading a bunch of zeros and ones. You use hexa because each hexa digit corresponds to 4 bits, this makes it very easy to convert from hexa do binary and vice versa. For a similar reason you use octal because each digit corresponds to 3 binary digits. Example: 0101 10102 Has 8 binary digits so it will be 2 hexa digits: 01012 = 516 , 10102 = A16 So the full number will be: 0101 10102 = 5A16 This works for hexa and octal because 16 and 8 are powers of 2, it would also work for 4, 32, 64 or any other ower of 2 . Since 10 for decimal notation is not a power of 2 converting from binary is not so direct.
multiply the decimal by 100 to convert it into a percent.
The answer will depend on what you want to convert into a decimal number.
If the number is already in decimal form, you do not need to do anything to "convert" it to decimal!
9.80 IS a decimal so to convert it to a decimal you, very carefully, leave it exactly as it is.