ratio - it compares two numbers
A ratio shows the relative sizes of two or more values.
Ratios can be shown is different ways using the the : to separate example values, or as a single number by dividing one value by the total.
Example : if there is 1 boy and three girls you could write the ratio as :
3:1 (for every one boy there are three girls )
1/3 are boys and 2/3 are girls 0.33 are boys (by dividing 1 by 3 ) 1 to 3
Real life ratio
Recipes , the amount of nuts to raisins in trail mix
The cost of laundry detergent per ounc