-68.22% is the change from 645 to 205
Calculation steps:
[( 205 - 645 ) ÷ 645] x 100 = -68.22%
Formula
Percentage change = [(205 - 645) / 645] x 100
Subtract the new number by the original number
205 - 645 = -440
-440 ÷ 645 = -0.6821705426356589
-0.6821705426356589 x 100 = -68.22%