-2.16% is the change from 185 to 181
Calculation steps:
[( 181 - 185 ) ÷ 185] x 100 = -2.16%
Formula
Percentage change = [(181 - 185) / 185] x 100
Subtract the new number by the original number
181 - 185 = -4
-4 ÷ 185 = -0.021621621621621623
-0.021621621621621623 x 100 = -2.16%