-24.18% is the change from 641 to 486
Calculation steps:
[( 486 - 641 ) ÷ 641] x 100 = -24.18%
Formula
Percentage change = [(486 - 641) / 641] x 100
Subtract the new number by the original number
486 - 641 = -155
-155 ÷ 641 = -0.24180967238689546
-0.24180967238689546 x 100 = -24.18%