-51.76% is the change from 340 to 164
Calculation steps:
[( 164 - 340 ) ÷ 340] x 100 = -51.76%
Formula
Percentage change = [(164 - 340) / 340] x 100
Subtract the new number by the original number
164 - 340 = -176
-176 ÷ 340 = -0.5176470588235295
-0.5176470588235295 x 100 = -51.76%