-26.77% is the change from 878 to 643
Calculation steps:
[( 643 - 878 ) ÷ 878] x 100 = -26.77%
Formula
Percentage change = [(643 - 878) / 878] x 100
Subtract the new number by the original number
643 - 878 = -235
-235 ÷ 878 = -0.26765375854214124
-0.26765375854214124 x 100 = -26.77%