How does increase loot rate work?

Hi,

I got VIP recently and it says +50% loot rate. iW db,renewal.playragnarok.com, etc all say that mukas drop cactus needles 90% of the time. 50% extra should mean the chance goes up to 135% right? But I still only get cactus needles about the same as before. So, how does the increased loot rate work <snip> ?

Edited by VModIceCreamCake - Removed off topic links.

Edited by VModIceCreamCake, 13 February 2022 - 10:54 PM.

https://irowiki.org/...tem#Calculation