-18.93% is the change from 766 to 621
Calculation steps:
[( 621 - 766 ) ÷ 766] x 100 = -18.93%
Formula
Percentage change = [(621 - 766) / 766] x 100
Subtract the new number by the original number
621 - 766 = -145
-145 ÷ 766 = -0.18929503916449086
-0.18929503916449086 x 100 = -18.93%