-29.73% is the change from 878 to 617
Calculation steps:
[( 617 - 878 ) ÷ 878] x 100 = -29.73%
Formula
Percentage change = [(617 - 878) / 878] x 100
Subtract the new number by the original number
617 - 878 = -261
-261 ÷ 878 = -0.2972665148063781
-0.2972665148063781 x 100 = -29.73%