-55.92% is the change from 878 to 387
Calculation steps:
[( 387 - 878 ) ÷ 878] x 100 = -55.92%
Formula
Percentage change = [(387 - 878) / 878] x 100
Subtract the new number by the original number
387 - 878 = -491
-491 ÷ 878 = -0.5592255125284739
-0.5592255125284739 x 100 = -55.92%