-12.76% is the change from 815 to 711
Calculation steps:
[( 711 - 815 ) ÷ 815] x 100 = -12.76%
Formula
Percentage change = [(711 - 815) / 815] x 100
Subtract the new number by the original number
711 - 815 = -104
-104 ÷ 815 = -0.1276073619631902
-0.1276073619631902 x 100 = -12.76%