-78.69% is the change from 990 to 211
Calculation steps:
[( 211 - 990 ) ÷ 990] x 100 = -78.69%
Formula
Percentage change = [(211 - 990) / 990] x 100
Subtract the new number by the original number
211 - 990 = -779
-779 ÷ 990 = -0.7868686868686868
-0.7868686868686868 x 100 = -78.69%