-6.6% is the change from 606 to 566
Calculation steps:
[( 566 - 606 ) ÷ 606] x 100 = -6.6%
Formula
Percentage change = [(566 - 606) / 606] x 100
Subtract the new number by the original number
566 - 606 = -40
-40 ÷ 606 = -0.066006600660066
-0.066006600660066 x 100 = -6.6%