basic maths (example):
total 100 000 coins
account A 0.1% (100 coins) earns 1 a day
account B 10% (10 000 coins) earns 100 a day
So there are 100000 coins represents 100%.
Where are another 89.9%? Lets name it account C (89900 coins).
after one day
account A 101 coins = 0.101%
account B 10100 coins = 10.1%
And account C 90799 coins.
So NOW 100% coins != 100000 coins. It is 90799+10100+101=101000 now.
So A still has 0.1%
B still has 10%
C still has 89.9%
etc