-29.24% is the change from 643 to 455
Calculation steps:
[( 455 - 643 ) ÷ 643] x 100 = -29.24%
Formula
Percentage change = [(455 - 643) / 643] x 100
Subtract the new number by the original number
455 - 643 = -188
-188 ÷ 643 = -0.29237947122861585
-0.29237947122861585 x 100 = -29.24%