-9.49% is the change from 991 to 897
Calculation steps:
[( 897 - 991 ) ÷ 991] x 100 = -9.49%
Formula
Percentage change = [(897 - 991) / 991] x 100
Subtract the new number by the original number
897 - 991 = -94
-94 ÷ 991 = -0.09485368314833502
-0.09485368314833502 x 100 = -9.49%