-51.92% is the change from 339 to 163
Calculation steps:
[( 163 - 339 ) ÷ 339] x 100 = -51.92%
Formula
Percentage change = [(163 - 339) / 339] x 100
Subtract the new number by the original number
163 - 339 = -176
-176 ÷ 339 = -0.5191740412979351
-0.5191740412979351 x 100 = -51.92%