-1.33% is the change from 826 to 815
Calculation steps:
[( 815 - 826 ) ÷ 826] x 100 = -1.33%
Formula
Percentage change = [(815 - 826) / 826] x 100
Subtract the new number by the original number
815 - 826 = -11
-11 ÷ 826 = -0.013317191283292978
-0.013317191283292978 x 100 = -1.33%