-72.61% is the change from 606 to 166
Calculation steps:
[( 166 - 606 ) ÷ 606] x 100 = -72.61%
Formula
Percentage change = [(166 - 606) / 606] x 100
Subtract the new number by the original number
166 - 606 = -440
-440 ÷ 606 = -0.7260726072607261
-0.7260726072607261 x 100 = -72.61%