-6.95% is the change from 878 to 817
Calculation steps:
[( 817 - 878 ) ÷ 878] x 100 = -6.95%
Formula
Percentage change = [(817 - 878) / 878] x 100
Subtract the new number by the original number
817 - 878 = -61
-61 ÷ 878 = -0.06947608200455581
-0.06947608200455581 x 100 = -6.95%