-30.41% is the change from 878 to 611
Calculation steps:
[( 611 - 878 ) ÷ 878] x 100 = -30.41%
Formula
Percentage change = [(611 - 878) / 878] x 100
Subtract the new number by the original number
611 - 878 = -267
-267 ÷ 878 = -0.3041002277904328
-0.3041002277904328 x 100 = -30.41%