-75.51% is the change from 878 to 215
Calculation steps:
[( 215 - 878 ) ÷ 878] x 100 = -75.51%
Formula
Percentage change = [(215 - 878) / 878] x 100
Subtract the new number by the original number
215 - 878 = -663
-663 ÷ 878 = -0.755125284738041
-0.755125284738041 x 100 = -75.51%