-66.97% is the change from 878 to 290
Calculation steps:
[( 290 - 878 ) ÷ 878] x 100 = -66.97%
Formula
Percentage change = [(290 - 878) / 878] x 100
Subtract the new number by the original number
290 - 878 = -588
-588 ÷ 878 = -0.6697038724373576
-0.6697038724373576 x 100 = -66.97%