-19.48% is the change from 991 to 798
Calculation steps:
[( 798 - 991 ) ÷ 991] x 100 = -19.48%
Formula
Percentage change = [(798 - 991) / 991] x 100
Subtract the new number by the original number
798 - 991 = -193
-193 ÷ 991 = -0.19475277497477295
-0.19475277497477295 x 100 = -19.48%