-89.78% is the change from 881 to 90
Calculation steps:
[( 90 - 881 ) ÷ 881] x 100 = -89.78%
Formula
Percentage change = [(90 - 881) / 881] x 100
Subtract the new number by the original number
90 - 881 = -791
-791 ÷ 881 = -0.8978433598183881
-0.8978433598183881 x 100 = -89.78%