-21.19% is the change from 788 to 621
Calculation steps:
[( 621 - 788 ) ÷ 788] x 100 = -21.19%
Formula
Percentage change = [(621 - 788) / 788] x 100
Subtract the new number by the original number
621 - 788 = -167
-167 ÷ 788 = -0.21192893401015228
-0.21192893401015228 x 100 = -21.19%