How is it determined? A minute ago, it said my level went up to 62%. Then I did another exercise and got a perfect score, and my level went down to 61%. ???
You have to get all the questions right in a lesson without looking at a meaning of a word or tapping, moving things twice. Then your fluency will move up.
I agree, the right question would be - How to boost the frequency? And you just answered. =) Greets, J.V.
They calculate your fluency score as a decimal between 0 and 1. For example, your fluency decimal right now is 0.5559018814. The fluency score at Duolingo doesn't round, so the fluency percentage for you now is 55 percent, which by the way is really good. I'm at like 16 percent.