-68.34% is the change from 878 to 278
Calculation steps:
[( 278 - 878 ) ÷ 878] x 100 = -68.34%
Formula
Percentage change = [(278 - 878) / 878] x 100
Subtract the new number by the original number
278 - 878 = -600
-600 ÷ 878 = -0.683371298405467
-0.683371298405467 x 100 = -68.34%