-65.15% is the change from 878 to 306
Calculation steps:
[( 306 - 878 ) ÷ 878] x 100 = -65.15%
Formula
Percentage change = [(306 - 878) / 878] x 100
Subtract the new number by the original number
306 - 878 = -572
-572 ÷ 878 = -0.6514806378132119
-0.6514806378132119 x 100 = -65.15%