Compounded interest, that is how compounding works. The percentage format is not linear, it's exponential.

From 1$ to 10$ - > 1000%
From 10$ to 100$ -> 1000%
From 1$ to 100$ -> 10,000%

The percentage grows exponentially the further away you to in arithmetic distance.

I don't have to show how much is invested, just take the LN(sell price / buy price) and get the LN ratio:

• https://mathbabe.org/2011/08/30/why-log-returns/