-1.35% is the change from 815 to 804
Calculation steps:
[( 804 - 815 ) ÷ 815] x 100 = -1.35%
Formula
Percentage change = [(804 - 815) / 815] x 100
Subtract the new number by the original number
804 - 815 = -11
-11 ÷ 815 = -0.013496932515337423
-0.013496932515337423 x 100 = -1.35%