-9.99% is the change from 991 to 892
Calculation steps:
[( 892 - 991 ) ÷ 991] x 100 = -9.99%
Formula
Percentage change = [(892 - 991) / 991] x 100
Subtract the new number by the original number
892 - 991 = -99
-99 ÷ 991 = -0.09989909182643794
-0.09989909182643794 x 100 = -9.99%