-67.75% is the change from 645 to 208
Calculation steps:
[( 208 - 645 ) ÷ 645] x 100 = -67.75%
Formula
Percentage change = [(208 - 645) / 645] x 100
Subtract the new number by the original number
208 - 645 = -437
-437 ÷ 645 = -0.6775193798449612
-0.6775193798449612 x 100 = -67.75%