45.0
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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 45, exactly as in the question.
45 percent as a fraction is 45/100 or 9/20. 45 percent as a decimal is 0.45.
45 divided by 15 is 3. Three 15s make 45 so she spend 1/3 (fraction), 0.33 (decimal), 33% (percent), of her money
45/100 as a fraction in its simplest form = 9/20 45/100 as a decimal = 0.45
45/125 = 45 ÷ 125 = 0.36