-99.78% is the change from 900 to 2
Calculation steps:
[( 2 - 900 ) ÷ 900] x 100 = -99.78%
Formula
Percentage change = [(2 - 900) / 900] x 100
Subtract the new number by the original number
2 - 900 = -898
-898 ÷ 900 = -0.9977777777777778
-0.9977777777777778 x 100 = -99.78%