-97.18% is the change from 390 to 11
Calculation steps:
[( 11 - 390 ) ÷ 390] x 100 = -97.18%
Formula
Percentage change = [(11 - 390) / 390] x 100
Subtract the new number by the original number
11 - 390 = -379
-379 ÷ 390 = -0.9717948717948718
-0.9717948717948718 x 100 = -97.18%