With a scale of 1" representing 1', all you do is change the word feet to inches or inches to feet, depending on which way the conversion is. So 10" represents 10', 1.5" represents 1.5', and so on. 10" when reduced to scale is converting 5/6' to 5/6". Divide an inch into sixths (divide into half first, then you can guess how to divide each half into thirds) and count off 5. If 10" is the scaled down measurement then 10' is the scaled up measurement. I hope this helps.