-71.18% is the change from 819 to 236
Calculation steps:
[( 236 - 819 ) ÷ 819] x 100 = -71.18%
Formula
Percentage change = [(236 - 819) / 819] x 100
Subtract the new number by the original number
236 - 819 = -583
-583 ÷ 819 = -0.7118437118437119
-0.7118437118437119 x 100 = -71.18%