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 30, exactly as in the question.
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decimal for 20 over 30 = 0.6666...20/30:= 20 ÷ 30= 0.6666... in decimal
30 percent as a decimal is: 0.30
30% is 30/100 which is also .3 as a decimal.
30/100= 30 ÷ 100= 0.30 in decimal
30% written in decimal form is 0.30