-22.31% is the change from 798 to 620
Calculation steps:
[( 620 - 798 ) ÷ 798] x 100 = -22.31%
Formula
Percentage change = [(620 - 798) / 798] x 100
Subtract the new number by the original number
620 - 798 = -178
-178 ÷ 798 = -0.22305764411027568
-0.22305764411027568 x 100 = -22.31%