-1.69% is the change from 829 to 815
Calculation steps:
[( 815 - 829 ) ÷ 829] x 100 = -1.69%
Formula
Percentage change = [(815 - 829) / 829] x 100
Subtract the new number by the original number
815 - 829 = -14
-14 ÷ 829 = -0.016887816646562123
-0.016887816646562123 x 100 = -1.69%