Rondedzera kushaya basa uye kuti kunoratidzwa sei munyika dzakawanda.
Percentage yevashandi vose vasina basa uye vari kutsvaka basa rinobhadharwa. Mwero wokushaikwa kwemabasa (# yevasina basa / # muvashandi) = % Mwero wokushaikwa kwemabasa ndeimwe yenhamba dzinonyatsocherechedzwa nokuti kuwedzera kwemari kunoonekwa sechiratidzo chokuderera kwoupfumi izvo zvingada kuti kuderedzwa kwemari yemubereko. Mwero unodonha, nenzira yakafanana, unoratidza hupfumi huri kukura uhwo hunowanzoperekedzwa nehuwandu hwehuwandu hwehuwandu uye hunogona kuda kuwedzera kwehuwandu hwemari.