How is ratio used in everyday life?
A very common use of ratio income spent on food to that on the rest
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
Suppose you had a litre of drink mix that had 15 parts flavouring to 130 parts water.
The total number of parts is
So as a ratio this would be
But as a fraction of the whole it would be