How does a Success/Drop Rate work?
Because of the confusion regarding how the success/drop rate (chance) works I decided to post a small explanation. I hope it's helpful.
The success/drop rate (chance) is re-diced every single try/drop attempt.
Let's imagine the chance to succeed a process (for example Monster Card blending)/drop an item is at 50%.
We are giving the RNG a number range from 1...1000. Every time the RNG generates a number < 500 for the specific try/drop attempt the try/drop fails.
1st try - RNG: 326: < 500 failed
2nd try - RNG: 488: < 500 failed
3rd try - RNG: 356: < 500 failed
4th try RNG: 15: < 500 failed
5th try RNG: 501: >= 500 success
if we would use the same example for a success chance of 65% by a given range of 1...1000 every time the RNG would generate a number < 350 would fail. That would mean for the example above:
1st try - RNG: 326: < 350 failed
2nd try - RNG: 488: >= 350 success
as you can see the success chance (rate) does not mean that you will get a definite success after X tries but still the chance to be successful at a specific re-dice is higher.
The only definite success is at 100% because the range in our example would be 1...1000 - the RNG would have to generate a number below 1 which would be not possible for a range 1...1000. So A 100% success rate IS actually a 100% success rate.
I hope that is understandable.