-19.9% is the change from 794 to 636
Calculation steps:
[( 636 - 794 ) ÷ 794] x 100 = -19.9%
Formula
Percentage change = [(636 - 794) / 794] x 100
Subtract the new number by the original number
636 - 794 = -158
-158 ÷ 794 = -0.19899244332493704
-0.19899244332493704 x 100 = -19.9%