-77.29% is the change from 643 to 146
Calculation steps:
[( 146 - 643 ) ÷ 643] x 100 = -77.29%
Formula
Percentage change = [(146 - 643) / 643] x 100
Subtract the new number by the original number
146 - 643 = -497
-497 ÷ 643 = -0.7729393468118196
-0.7729393468118196 x 100 = -77.29%