-77.18% is the change from 390 to 89
Calculation steps:
[( 89 - 390 ) ÷ 390] x 100 = -77.18%
Formula
Percentage change = [(89 - 390) / 390] x 100
Subtract the new number by the original number
89 - 390 = -301
-301 ÷ 390 = -0.7717948717948718
-0.7717948717948718 x 100 = -77.18%