-75.27% is the change from 643 to 159
Calculation steps:
[( 159 - 643 ) ÷ 643] x 100 = -75.27%
Formula
Percentage change = [(159 - 643) / 643] x 100
Subtract the new number by the original number
159 - 643 = -484
-484 ÷ 643 = -0.7527216174183515
-0.7527216174183515 x 100 = -75.27%