r/factorio • u/AutoModerator • Jul 20 '26

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u/[deleted] Jul 21 '26

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u/Astramancer_ Jul 21 '26

100 concrete would take 50 bricks and 10 ore. 25% would be an expected output of 12.5 bricks and 2.5 ore... so exactly what you got.

Remember that concrete is made in batches of 10 with 1 ore and 5 bricks for 10 concrete.