-25.03% is the change from 915 to 686
Calculation steps:
[( 686 - 915 ) ÷ 915] x 100 = -25.03%
Formula
Percentage change = [(686 - 915) / 915] x 100
Subtract the new number by the original number
686 - 915 = -229
-229 ÷ 915 = -0.2502732240437158
-0.2502732240437158 x 100 = -25.03%