-3.3% is the change from 878 to 849
Calculation steps:
[( 849 - 878 ) ÷ 878] x 100 = -3.3%
Formula
Percentage change = [(849 - 878) / 878] x 100
Subtract the new number by the original number
849 - 878 = -29
-29 ÷ 878 = -0.03302961275626424
-0.03302961275626424 x 100 = -3.3%