59.9956
109.2896
0.915
.915
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 915, exactly as in the question.
890
904 = 90,400%
113
131 minutes
904
904 = CMIV
915 is an integer and not a fraction but, if you must, you could write it as 915/1