-21.39% is the change from 790 to 621
Calculation steps:
[( 621 - 790 ) ÷ 790] x 100 = -21.39%
Formula
Percentage change = [(621 - 790) / 790] x 100
Subtract the new number by the original number
621 - 790 = -169
-169 ÷ 790 = -0.2139240506329114
-0.2139240506329114 x 100 = -21.39%