-89.49% is the change from 390 to 41
Calculation steps:
[( 41 - 390 ) ÷ 390] x 100 = -89.49%
Formula
Percentage change = [(41 - 390) / 390] x 100
Subtract the new number by the original number
41 - 390 = -349
-349 ÷ 390 = -0.8948717948717949
-0.8948717948717949 x 100 = -89.49%