-99.16% is the change from 838 to 7
Calculation steps:
[( 7 - 838 ) ÷ 838] x 100 = -99.16%
Formula
Percentage change = [(7 - 838) / 838] x 100
Subtract the new number by the original number
7 - 838 = -831
-831 ÷ 838 = -0.9916467780429594
-0.9916467780429594 x 100 = -99.16%