-85.37% is the change from 622 to 91
Calculation steps:
[( 91 - 622 ) ÷ 622] x 100 = -85.37%
Formula
Percentage change = [(91 - 622) / 622] x 100
Subtract the new number by the original number
91 - 622 = -531
-531 ÷ 622 = -0.8536977491961415
-0.8536977491961415 x 100 = -85.37%