-23.78% is the change from 900 to 686
Calculation steps:
[( 686 - 900 ) ÷ 900] x 100 = -23.78%
Formula
Percentage change = [(686 - 900) / 900] x 100
Subtract the new number by the original number
686 - 900 = -214
-214 ÷ 900 = -0.23777777777777778
-0.23777777777777778 x 100 = -23.78%