-69.54% is the change from 545 to 166
Calculation steps:
[( 166 - 545 ) ÷ 545] x 100 = -69.54%
Formula
Percentage change = [(166 - 545) / 545] x 100
Subtract the new number by the original number
166 - 545 = -379
-379 ÷ 545 = -0.6954128440366972
-0.6954128440366972 x 100 = -69.54%