-93.66% is the change from 647 to 41
Calculation steps:
[( 41 - 647 ) ÷ 647] x 100 = -93.66%
Formula
Percentage change = [(41 - 647) / 647] x 100
Subtract the new number by the original number
41 - 647 = -606
-606 ÷ 647 = -0.9366306027820711
-0.9366306027820711 x 100 = -93.66%