=(20052005-2005-0.2005)/(80208020-8020-0.8020)
=(20050000-0.2005)/(80200000-0.8020)
=[2005*(10000-0.0001)]/[8020*(10000-0.0001)]
=2005/8020
=(20052005-2005-0.2005)/(80208020-8020-0.8020)
=(20050000-0.2005)/(80200000-0.8020)
=[2005*(10000-0.0001)]/[8020*(10000-0.0001)]
=2005/8020