-30.87% is the change from 878 to 607
Calculation steps:
[( 607 - 878 ) ÷ 878] x 100 = -30.87%
Formula
Percentage change = [(607 - 878) / 878] x 100
Subtract the new number by the original number
607 - 878 = -271
-271 ÷ 878 = -0.3086560364464693
-0.3086560364464693 x 100 = -30.87%