-16.01% is the change from 606 to 509
Calculation steps:
[( 509 - 606 ) ÷ 606] x 100 = -16.01%
Formula
Percentage change = [(509 - 606) / 606] x 100
Subtract the new number by the original number
509 - 606 = -97
-97 ÷ 606 = -0.16006600660066006
-0.16006600660066006 x 100 = -16.01%