-81.78% is the change from 845 to 154
Calculation steps:
[( 154 - 845 ) ÷ 845] x 100 = -81.78%
Formula
Percentage change = [(154 - 845) / 845] x 100
Subtract the new number by the original number
154 - 845 = -691
-691 ÷ 845 = -0.8177514792899409
-0.8177514792899409 x 100 = -81.78%