-88.61% is the change from 641 to 73
Calculation steps:
[( 73 - 641 ) ÷ 641] x 100 = -88.61%
Formula
Percentage change = [(73 - 641) / 641] x 100
Subtract the new number by the original number
73 - 641 = -568
-568 ÷ 641 = -0.8861154446177847
-0.8861154446177847 x 100 = -88.61%