-78.23% is the change from 643 to 140
Calculation steps:
[( 140 - 643 ) ÷ 643] x 100 = -78.23%
Formula
Percentage change = [(140 - 643) / 643] x 100
Subtract the new number by the original number
140 - 643 = -503
-503 ÷ 643 = -0.7822706065318819
-0.7822706065318819 x 100 = -78.23%