The JP version 従来の3倍に引き上げられます, if I read it correctly, says the drop rate has been increased to 3 times of what it was. So if it was 10% rate before, now it is 30% rate.

This thread has me doubting my English and Japanese. :x

Originally 10.
Increased to 300% = tripled = now 30.
Increased by 300% = now 40.