-50.11% is the change from 878 to 438
Calculation steps:
[( 438 - 878 ) ÷ 878] x 100 = -50.11%
Formula
Percentage change = [(438 - 878) / 878] x 100
Subtract the new number by the original number
438 - 878 = -440
-440 ÷ 878 = -0.5011389521640092
-0.5011389521640092 x 100 = -50.11%