-6.38% is the change from 878 to 822
Calculation steps:
[( 822 - 878 ) ÷ 878] x 100 = -6.38%
Formula
Percentage change = [(822 - 878) / 878] x 100
Subtract the new number by the original number
822 - 878 = -56
-56 ÷ 878 = -0.06378132118451026
-0.06378132118451026 x 100 = -6.38%