-91.91% is the change from 643 to 52
Calculation steps:
[( 52 - 643 ) ÷ 643] x 100 = -91.91%
Formula
Percentage change = [(52 - 643) / 643] x 100
Subtract the new number by the original number
52 - 643 = -591
-591 ÷ 643 = -0.9191290824261276
-0.9191290824261276 x 100 = -91.91%