-1.93% is the change from 881 to 864
Calculation steps:
[( 864 - 881 ) ÷ 881] x 100 = -1.93%
Formula
Percentage change = [(864 - 881) / 881] x 100
Subtract the new number by the original number
864 - 881 = -17
-17 ÷ 881 = -0.019296254256526674
-0.019296254256526674 x 100 = -1.93%