-25.14% is the change from 915 to 685
Calculation steps:
[( 685 - 915 ) ÷ 915] x 100 = -25.14%
Formula
Percentage change = [(685 - 915) / 915] x 100
Subtract the new number by the original number
685 - 915 = -230
-230 ÷ 915 = -0.25136612021857924
-0.25136612021857924 x 100 = -25.14%