.42 is smaller than .428
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4.2% = 0.042
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 decimal representation of 42 is 42, exactly as in the question.
42/11 = 3.8181 . . .
To convert a decimal to a percentage, you multiply by 100. Therefore, to convert 4.28 to a percentage, you would multiply 4.28 by 100 to get 428%. So, 4.28 is equal to 428% in percentage form.
4.2