-71.85% is the change from 643 to 181
Calculation steps:
[( 181 - 643 ) ÷ 643] x 100 = -71.85%
Formula
Percentage change = [(181 - 643) / 643] x 100
Subtract the new number by the original number
181 - 643 = -462
-462 ÷ 643 = -0.71850699844479
-0.71850699844479 x 100 = -71.85%