0.4
You write it the following way $40,00.00
0.40
40% = 0.4
40 and there is absolutely no need to add the decimal point. Furthermore, adding a 0 after the decimal point is wrong because that implies that the number is accurate to a tenth - and there is o justification for that level of accuracy.
0.4
It is 40.
You write it the following way $40,00.00
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. If it does not contain a fractional part then the decimal representation does not require a decimal point. So the decimal for 40 is 40 – as in the question.
40 as a decimal would just be 40.0
0.40
40% = 0.4
51/40 written as a decimal is 1.275
14/40 in decimal form is 0.35
40 = forty
40 and there is absolutely no need to add the decimal point. Furthermore, adding a 0 after the decimal point is wrong because that implies that the number is accurate to a tenth - and there is o justification for that level of accuracy.
.40