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Proportions are used in real life to determine prices of things.
Believe it or not, school is a real life situation. If you are using it in school it real life for you.
numbers are used in every day life such as how old are you? whats 2+2? <forget that> if your talkin about real number as in |-26| = 26 then yeah forget it. I think that real numbers would be used in things like how far are you away from something for example you wouldn't need to know if you are - amount away or + just that you are a certain distance.
The measurement of a length of an object is always a positive number.
If you are in school and are studying trig then you are using trig in real life.