apportion

verb
ap·​por·​tion | \ ə-ˈpȯr-shən How to pronounce apportion (audio) \
apportioned; apportioning\ ə-​ˈpȯr-​sh(ə-​)niŋ How to pronounce apportioning (audio) \

Definition of apportion

transitive verb

: to divide and share out according to a plan especially : to make a proportionate division or distribution of Representatives are apportioned among the states.