Multiply both top and bottom by 10 for every number after the decimal point. (For example, if there are two numbers after the decimal point, then use 100, if there are three then use 1000, etc.)
He rode 6 rides times some number that cost 19.56, therefore 6x =19.56 Solve for x to find what the cost is or in this case the value of proportion. X=3.26
