-25.43% is the change from 641 to 478
Calculation steps:
[( 478 - 641 ) ÷ 641] x 100 = -25.43%
Formula
Percentage change = [(478 - 641) / 641] x 100
Subtract the new number by the original number
478 - 641 = -163
-163 ÷ 641 = -0.2542901716068643
-0.2542901716068643 x 100 = -25.43%