reduction percentages for printers ???

one time i saw a help topic on reducing ho and n scale to z scale, but i cant find the topic again. can someone refresh me as to to the percents from ho to n,, to turn into z ??? thankyou canada mike

hope this helps.

so,,, if im reading this right,,, 40 percent for n,,,73 for ho scale?????????????/

oopd got those twisted,,40 for n 73 percent reduction for ho??