-16.44% is the change from 815 to 681
Calculation steps:
[( 681 - 815 ) ÷ 815] x 100 = -16.44%
Formula
Percentage change = [(681 - 815) / 815] x 100
Subtract the new number by the original number
681 - 815 = -134
-134 ÷ 815 = -0.16441717791411042
-0.16441717791411042 x 100 = -16.44%