-8.71% is the change from 620 to 566
Calculation steps:
[( 566 - 620 ) ÷ 620] x 100 = -8.71%
Formula
Percentage change = [(566 - 620) / 620] x 100
Subtract the new number by the original number
566 - 620 = -54
-54 ÷ 620 = -0.08709677419354839
-0.08709677419354839 x 100 = -8.71%