-29.15% is the change from 645 to 457
Calculation steps:
[( 457 - 645 ) ÷ 645] x 100 = -29.15%
Formula
Percentage change = [(457 - 645) / 645] x 100
Subtract the new number by the original number
457 - 645 = -188
-188 ÷ 645 = -0.29147286821705426
-0.29147286821705426 x 100 = -29.15%