-73.87% is the change from 643 to 168
Calculation steps:
[( 168 - 643 ) ÷ 643] x 100 = -73.87%
Formula
Percentage change = [(168 - 643) / 643] x 100
Subtract the new number by the original number
168 - 643 = -475
-475 ÷ 643 = -0.7387247278382582
-0.7387247278382582 x 100 = -73.87%