How do I Put drop %

How can i put drop %, like, chance drop 20% heart in monster.

In internet have many tutorial to random drop, but % i did not find.

Try this:

If random(100)<20 then drop item

This random is "Pick random instance" ?

I did this :

Enemy on destroyed Enemy Drop Item

System pick a random instance

System 100<20

But not work.

Bah, this work man hahaha

Thanks

I never work with random, soo this is new to me, but this is simple. hehe

Thanks soo much !