-40.85% is the change from 306 to 181
Calculation steps:
[( 181 - 306 ) ÷ 306] x 100 = -40.85%
Formula
Percentage change = [(181 - 306) / 306] x 100
Subtract the new number by the original number
181 - 306 = -125
-125 ÷ 306 = -0.4084967320261438
-0.4084967320261438 x 100 = -40.85%