-11.12% is the change from 917 to 815
Calculation steps:
[( 815 - 917 ) ÷ 917] x 100 = -11.12%
Formula
Percentage change = [(815 - 917) / 917] x 100
Subtract the new number by the original number
815 - 917 = -102
-102 ÷ 917 = -0.11123227917121047
-0.11123227917121047 x 100 = -11.12%