-11.86% is the change from 177 to 156
Calculation steps:
[( 156 - 177 ) ÷ 177] x 100 = -11.86%
Formula
Percentage change = [(156 - 177) / 177] x 100
Subtract the new number by the original number
156 - 177 = -21
-21 ÷ 177 = -0.11864406779661017
-0.11864406779661017 x 100 = -11.86%