Yes
One example is the quoted fuel efficiency of cars: either in kilometres per litre or as miles per gallon.
You can subtract them or divide them. If you subtract them, the result is their difference. If you divide them, the result is their ratio.
Yes, that's true. Basically you can multiply and divide them; but you can't add, subtract, or compare them.
The ratio of two equal quantities is 1 .
Input and output (of energy)
A ratio uses division to compare two quantities.
=, > or <.
Yes, two probabilities.
Yes
to compare the two quantities
compare the two stroke and four stroke engine in power output and thermal efficiency?
One example is the quoted fuel efficiency of cars: either in kilometres per litre or as miles per gallon.
Rate is a comparison based on division.
you cannot compare these two quantities as they have a different dimension
In algebra mathematical symbols are used to compare multiple quantities. The symbols are < and > which represent greater or less than depending on expression and = for equivalent. Another symbol of quantity comparison is less/greater than or equal to.
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