-25.66% is the change from 643 to 478
Calculation steps:
[( 478 - 643 ) ÷ 643] x 100 = -25.66%
Formula
Percentage change = [(478 - 643) / 643] x 100
Subtract the new number by the original number
478 - 643 = -165
-165 ÷ 643 = -0.25660964230171074
-0.25660964230171074 x 100 = -25.66%