This is a compound interest-like problem.
The formula we can use is:

P is the initial value of the skill we are trying to improve
r is the rate we are improving per day, in decimal
Then:
Let's say P = 1, that's the initial value of the skill
To convert 1% daily in to decimal:

Thus:

Using the value given by the problem:

This means that after a year of improving 1% daily, we are getting 37.78 times better at it!
To convert this to percentage, we multiply by 100:

The answer is 3778%