-19.87% is the change from 775 to 621
Calculation steps:
[( 621 - 775 ) ÷ 775] x 100 = -19.87%
Formula
Percentage change = [(621 - 775) / 775] x 100
Subtract the new number by the original number
621 - 775 = -154
-154 ÷ 775 = -0.19870967741935483
-0.19870967741935483 x 100 = -19.87%