-13.37% is the change from 815 to 706
Calculation steps:
[( 706 - 815 ) ÷ 815] x 100 = -13.37%
Formula
Percentage change = [(706 - 815) / 815] x 100
Subtract the new number by the original number
706 - 815 = -109
-109 ÷ 815 = -0.13374233128834356
-0.13374233128834356 x 100 = -13.37%