-84.92% is the change from 809 to 122
Calculation steps:
[( 122 - 809 ) ÷ 809] x 100 = -84.92%
Formula
Percentage change = [(122 - 809) / 809] x 100
Subtract the new number by the original number
122 - 809 = -687
-687 ÷ 809 = -0.8491965389369592
-0.8491965389369592 x 100 = -84.92%