-73.23% is the change from 620 to 166
Calculation steps:
[( 166 - 620 ) ÷ 620] x 100 = -73.23%
Formula
Percentage change = [(166 - 620) / 620] x 100
Subtract the new number by the original number
166 - 620 = -454
-454 ÷ 620 = -0.7322580645161291
-0.7322580645161291 x 100 = -73.23%