-25.52% is the change from 921 to 686
Calculation steps:
[( 686 - 921 ) ÷ 921] x 100 = -25.52%
Formula
Percentage change = [(686 - 921) / 921] x 100
Subtract the new number by the original number
686 - 921 = -235
-235 ÷ 921 = -0.255157437567861
-0.255157437567861 x 100 = -25.52%