-90.64% is the change from 171 to 16
Calculation steps:
[( 16 - 171 ) ÷ 171] x 100 = -90.64%
Formula
Percentage change = [(16 - 171) / 171] x 100
Subtract the new number by the original number
16 - 171 = -155
-155 ÷ 171 = -0.9064327485380117
-0.9064327485380117 x 100 = -90.64%