-17.87% is the change from 834 to 685
Calculation steps:
[( 685 - 834 ) ÷ 834] x 100 = -17.87%
Formula
Percentage change = [(685 - 834) / 834] x 100
Subtract the new number by the original number
685 - 834 = -149
-149 ÷ 834 = -0.17865707434052758
-0.17865707434052758 x 100 = -17.87%