-51.79% is the change from 390 to 188
Calculation steps:
[( 188 - 390 ) ÷ 390] x 100 = -51.79%
Formula
Percentage change = [(188 - 390) / 390] x 100
Subtract the new number by the original number
188 - 390 = -202
-202 ÷ 390 = -0.517948717948718
-0.517948717948718 x 100 = -51.79%