-39.96% is the change from 478 to 287
Calculation steps:
[( 287 - 478 ) ÷ 478] x 100 = -39.96%
Formula
Percentage change = [(287 - 478) / 478] x 100
Subtract the new number by the original number
287 - 478 = -191
-191 ÷ 478 = -0.399581589958159
-0.399581589958159 x 100 = -39.96%