-28.92% is the change from 906 to 644
Calculation steps:
[( 644 - 906 ) ÷ 906] x 100 = -28.92%
Formula
Percentage change = [(644 - 906) / 906] x 100
Subtract the new number by the original number
644 - 906 = -262
-262 ÷ 906 = -0.2891832229580574
-0.2891832229580574 x 100 = -28.92%