jefferson
Round down, satisfies lower quota. Violates upper quota, Benefits larger states.
Adams
Rounds up, satisfies upper quota. Violates lower quota, benefits smaller state.
Webster
Arithmetic mean, difference between degrees of representation of any two states can not decrease by transferring a seat from the better represented state to worse.
Deans
Harmonic mearn, difference between sizes of districts un any two states can not be made smaller by transfering a seat from better side to worse.
Hill
Ratio between average sizes of districts in any two states cam not be made smaller by transferring a seat from better to worse, also true for degrees of representation,