-1.57% is the change from 829 to 816
Calculation steps:
[( 816 - 829 ) ÷ 829] x 100 = -1.57%
Formula
Percentage change = [(816 - 829) / 829] x 100
Subtract the new number by the original number
816 - 829 = -13
-13 ÷ 829 = -0.015681544028950542
-0.015681544028950542 x 100 = -1.57%