I think you mean rational. No, there are Irrational Numbers, like pi, and unreal numbers, like 2/0
Not sure about the ration bit, but I suspect that the answer is a percentage.
No
pythogoras
A balanced diet ration is the ration of the various components that you have in your diet. For proteins and carbohydrates the ratio should be one to two so for every one protein, there are two carbohydrates.
It's the ration card number.
It is a rational number because it can be expressed as a fraction
No, but it is a rational number.
A fixed allowance of food in WW2 was called a ration. Every soldier had their specific ration of food each day.
It is not, it is irrational. So the question is misguided.
The sum of the three can be rational or irrational.
If a number has a finite number of decimals, then it is RATIONAL.
Yes. A rational number is one that can be expressed as a ration of two whole numbers. 0.171717 is 171717/1000000 or the ration of 171717 to 1000000 [ the word rational has the same linguistic root as ratio].