-21.98% is the change from 878 to 685
Calculation steps:
[( 685 - 878 ) ÷ 878] x 100 = -21.98%
Formula
Percentage change = [(685 - 878) / 878] x 100
Subtract the new number by the original number
685 - 878 = -193
-193 ÷ 878 = -0.21981776765375854
-0.21981776765375854 x 100 = -21.98%