-52.57% is the change from 643 to 305
Calculation steps:
[( 305 - 643 ) ÷ 643] x 100 = -52.57%
Formula
Percentage change = [(305 - 643) / 643] x 100
Subtract the new number by the original number
305 - 643 = -338
-338 ÷ 643 = -0.5256609642301711
-0.5256609642301711 x 100 = -52.57%