-2.15% is the change from 883 to 864
Calculation steps:
[( 864 - 883 ) ÷ 883] x 100 = -2.15%
Formula
Percentage change = [(864 - 883) / 883] x 100
Subtract the new number by the original number
864 - 883 = -19
-19 ÷ 883 = -0.021517553793884484
-0.021517553793884484 x 100 = -2.15%