Ultimate Recycling

When you scrap a fleet at a starbase, you recover 90% of the minerals and 70% of the resources used to produce the fleet. The resources are available for use the next year. Scrapping at a planet gives you 45% of the minerals and 35% of the resources.

These resources are not strictly additive. The number a planet receives is determined by the formula:

(Current_production x Extra_resources) /
(Current_production + Extra_resources)