-19.05% is the change from 798 to 646
Calculation steps:
[( 646 - 798 ) ÷ 798] x 100 = -19.05%
Formula
Percentage change = [(646 - 798) / 798] x 100
Subtract the new number by the original number
646 - 798 = -152
-152 ÷ 798 = -0.19047619047619047
-0.19047619047619047 x 100 = -19.05%