-9.73% is the change from 915 to 826
Calculation steps:
[( 826 - 915 ) ÷ 915] x 100 = -9.73%
Formula
Percentage change = [(826 - 915) / 915] x 100
Subtract the new number by the original number
826 - 915 = -89
-89 ÷ 915 = -0.09726775956284153
-0.09726775956284153 x 100 = -9.73%