-28.85% is the change from 908 to 646
Calculation steps:
[( 646 - 908 ) ÷ 908] x 100 = -28.85%
Formula
Percentage change = [(646 - 908) / 908] x 100
Subtract the new number by the original number
646 - 908 = -262
-262 ÷ 908 = -0.28854625550660795
-0.28854625550660795 x 100 = -28.85%