-66.33% is the change from 493 to 166
Calculation steps:
[( 166 - 493 ) ÷ 493] x 100 = -66.33%
Formula
Percentage change = [(166 - 493) / 493] x 100
Subtract the new number by the original number
166 - 493 = -327
-327 ÷ 493 = -0.6632860040567952
-0.6632860040567952 x 100 = -66.33%