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 42, exactly as in the question.
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42% = .42
Expressed as a decimal, 42/100 is equal to 0.42.
5.2542/8:= 42 ÷ 8= 5.25 in decimal
42 and seven tenths = 42.7 in decimal
It is: 42% = 0.42