The result of your conversion between dunum, dunham and perch appears here
To convert between Dunum, Dunham and Perch you have to do the following:
First divide 1000 / 25.29285264 = 39.53686103
Then multiply the amount of Dunum, Dunham you want to convert to Perch, use the chart below to guide you.
Symbol: dunum
No description
Symbol: perch
No description