-11.9% is the change from 815 to 718
Calculation steps:
[( 718 - 815 ) ÷ 815] x 100 = -11.9%
Formula
Percentage change = [(718 - 815) / 815] x 100
Subtract the new number by the original number
718 - 815 = -97
-97 ÷ 815 = -0.11901840490797547
-0.11901840490797547 x 100 = -11.9%