-18.84% is the change from 796 to 646
Calculation steps:
[( 646 - 796 ) ÷ 796] x 100 = -18.84%
Formula
Percentage change = [(646 - 796) / 796] x 100
Subtract the new number by the original number
646 - 796 = -150
-150 ÷ 796 = -0.1884422110552764
-0.1884422110552764 x 100 = -18.84%