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 required decimal representation is 12, exactly as in the question.
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It is 0.75
You write it as 12, exactly as in the question.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. Adding zeros after the decimal point is wrong because they imply a degree of accuracy (significant figures) for which there is no justification.
7.5 is a decimal.
To write 75.6 as a decimal, you simply write the whole number part followed by a decimal point and then the decimal part. In this case, 75 is the whole number part, so you write it as 75., and then add the decimal part, which is .6. Therefore, 75.6 is the decimal representation of the number 75.6.
It is simply 127.0 as a decimal number