A fraction is a numerical constant. Being a fraction does not alter that. And, as a constant, its rate of change is precisely zero.
Unit rate, slope, and rate of change are different names for the same thing. Unit rates and slopes (if they are constant) are the same thing as a constant rate of change.
The unit of rate of change is whatever it is that is changing, divided by time units. For example, if you measure rate of change of dollars in your bank account, you would have something like dollars / month; for acceleration, the unit commonly used is (meters / second) / second, etc.
43/54000
A quantity is a numerical value that represents the amount or measurement of something, while a unit is a standardized amount used to measure that quantity. Quantity is the actual numerical value, while unit is the specific measurement scale used to quantify the quantity.
A rate of change in a variable Y, if not further qualified, is the change in Y for a unit change in time. However, the rate of change may be defined in terms of a unit change in some other variable (X). In graphical terms, the rate of change for a straight line is its gradient whereas for a curve, the rate of change at a point is the gradient of the tangent to the curve (if a tangent can be defined).
The rate of change indicates the change in one variable per unit change in a second variable at (or around) that level for the second variable.
The amount of change in each unit of time.
A kilogram is a measurement unit for mass. There is no numerical aspect to it.
When writing a numerical value you use the standard numerical unit. There is the use of number placement, ones, tens, hundreds and there is the decimal points and comma to give numerical value.
If an entiry is dependent on another entity in a certain way then the change in value of the dependent entity to an unit change in the value of the independent entity is the rate of change.
If an entiry is dependent on another entity in a certain way then the change in value of the dependent entity to an unit change in the value of the independent entity is the rate of change.