-1.68% is the change from 834 to 820
Calculation steps:
[( 820 - 834 ) ÷ 834] x 100 = -1.68%
Formula
Percentage change = [(820 - 834) / 834] x 100
Subtract the new number by the original number
820 - 834 = -14
-14 ÷ 834 = -0.016786570743405275
-0.016786570743405275 x 100 = -1.68%