You need to know what the value is.
If the number is 67 and a bit then 67.3
If the number is 673 millionths, then 0.000673
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120 is already in decimal form. You do not need to have a decimal point for a number to be in decimal form. All that is required is that the place values go down by a factor of one-tenth every time you move one digit to the right. Also the digit to the left of the decimal point (or where the decimal point would have been) has a unit place value.
It is a number with a decimal point. It is not necessarily a decimal number because 24 (no decimal pont) is a decimal number.It is a number with a decimal point. It is not necessarily a decimal number because 24 (no decimal pont) is a decimal number.It is a number with a decimal point. It is not necessarily a decimal number because 24 (no decimal pont) is a decimal number.It is a number with a decimal point. It is not necessarily a decimal number because 24 (no decimal pont) is a decimal number.
You write it as 0.004 because to the left of the decimal point is ones, to the first zero to the right of the decimal point is tenths, to the second zero to the right of the decimal point is hundredths, and so on.
34.67, rounded to the nearest decimal point, is 34.7.
A whole number can have (a) no digits after the decimal point - in which case it terminates at the decimal point, or (b) has a non-terminating sequence of 9s immediately after the decimal point.