Question 388857
To compare price/gallon of petrol, You need too do so for 
an equal number of miles driven, before and after the price
increase.
Before, the % ratio of costs to miles driven is {{{1/1}}}
I can call it {{{(1-.067)/(1-.067) = .933/.933}}}
Afterwards, the cost to miles driven is {{{.933 + .045)/.933 = .978/.933}}}
The % price rise is {{{(.978 - .933)*100 = 4.5}}}
The price rose 4.5%