-21.93% is the change from 798 to 623
Calculation steps:
[( 623 - 798 ) ÷ 798] x 100 = -21.93%
Formula
Percentage change = [(623 - 798) / 798] x 100
Subtract the new number by the original number
623 - 798 = -175
-175 ÷ 798 = -0.21929824561403508
-0.21929824561403508 x 100 = -21.93%