How is ratio used in everyday life?

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Answer 1 · 2016-05-18T20:22:53

A very common use of ratio income spent on food to that on the rest

Example: $("Expenditure for food")/("Total free income-expenditure for food")-> "say " 30/70$

Do not confuse this with a fraction. The total number of 'parts' is 30 on food and 70 on the rest making a total of 100 parts

So as a fraction of total free cash the food as percent is $30/100$

Suppose you had a litre of drink mix that had 15 parts flavouring to 130 parts water.

The total number of parts is $130+15=145$

So as a ratio this would be $("flavouring")/("water") ->15/130$

But as a fraction of the whole it would be
$("flavouring")/("water + flavouring")->15/145$