-9.89% is the change from 991 to 893
Calculation steps:
[( 893 - 991 ) ÷ 991] x 100 = -9.89%
Formula
Percentage change = [(893 - 991) / 991] x 100
Subtract the new number by the original number
893 - 991 = -98
-98 ÷ 991 = -0.09889001009081735
-0.09889001009081735 x 100 = -9.89%