-68.11% is the change from 878 to 280
Calculation steps:
[( 280 - 878 ) ÷ 878] x 100 = -68.11%
Formula
Percentage change = [(280 - 878) / 878] x 100
Subtract the new number by the original number
280 - 878 = -598
-598 ÷ 878 = -0.6810933940774487
-0.6810933940774487 x 100 = -68.11%