-30.85% is the change from 645 to 446
Calculation steps:
[( 446 - 645 ) ÷ 645] x 100 = -30.85%
Formula
Percentage change = [(446 - 645) / 645] x 100
Subtract the new number by the original number
446 - 645 = -199
-199 ÷ 645 = -0.3085271317829457
-0.3085271317829457 x 100 = -30.85%