-99.56% is the change from 900 to 4
Calculation steps:
[( 4 - 900 ) ÷ 900] x 100 = -99.56%
Formula
Percentage change = [(4 - 900) / 900] x 100
Subtract the new number by the original number
4 - 900 = -896
-896 ÷ 900 = -0.9955555555555555
-0.9955555555555555 x 100 = -99.56%