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 98, exactly as in the question.
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The ones in the percent would be in the hundredths place. The bold number is the ones place. 98%. Before the hundredths place are the tenths place and the ones. The decimal is 0.98 or .98.
Yes - any number without a decimal portion - even a negative number - is a whole number.
Zero is in the first decimal place of 98. An integer does not have any decimals, however, can be represented with decimals by placing first a decimal point ("dot") after the number and as many zeros as one wishes thereafter. For example, 98 is equal to the following values: (a) 98 (b) 98.0 (c) 98.00 (d) 98.00000000000000 Because the first decimal position is the first one to the right of the decimal point (as represented by examples b, c and d, above), the value is zero.
98/10 = 9.8
0.001*98 = 0.098