-26.87% is the change from 938 to 686
Calculation steps:
[( 686 - 938 ) ÷ 938] x 100 = -26.87%
Formula
Percentage change = [(686 - 938) / 938] x 100
Subtract the new number by the original number
686 - 938 = -252
-252 ÷ 938 = -0.26865671641791045
-0.26865671641791045 x 100 = -26.87%