-94.87% is the change from 643 to 33
Calculation steps:
[( 33 - 643 ) ÷ 643] x 100 = -94.87%
Formula
Percentage change = [(33 - 643) / 643] x 100
Subtract the new number by the original number
33 - 643 = -610
-610 ÷ 643 = -0.9486780715396579
-0.9486780715396579 x 100 = -94.87%