-50.57% is the change from 878 to 434
Calculation steps:
[( 434 - 878 ) ÷ 878] x 100 = -50.57%
Formula
Percentage change = [(434 - 878) / 878] x 100
Subtract the new number by the original number
434 - 878 = -444
-444 ÷ 878 = -0.5056947608200456
-0.5056947608200456 x 100 = -50.57%