-70.41% is the change from 561 to 166
Calculation steps:
[( 166 - 561 ) ÷ 561] x 100 = -70.41%
Formula
Percentage change = [(166 - 561) / 561] x 100
Subtract the new number by the original number
166 - 561 = -395
-395 ÷ 561 = -0.7040998217468806
-0.7040998217468806 x 100 = -70.41%