-21.82% is the change from 793 to 620
Calculation steps:
[( 620 - 793 ) ÷ 793] x 100 = -21.82%
Formula
Percentage change = [(620 - 793) / 793] x 100
Subtract the new number by the original number
620 - 793 = -173
-173 ÷ 793 = -0.21815889029003782
-0.21815889029003782 x 100 = -21.82%