-9.04% is the change from 177 to 161
Calculation steps:
[( 161 - 177 ) ÷ 177] x 100 = -9.04%
Formula
Percentage change = [(161 - 177) / 177] x 100
Subtract the new number by the original number
161 - 177 = -16
-16 ÷ 177 = -0.0903954802259887
-0.0903954802259887 x 100 = -9.04%