-21.82% is the change from 779 to 609
Calculation steps:
[( 609 - 779 ) ÷ 779] x 100 = -21.82%
Formula
Percentage change = [(609 - 779) / 779] x 100
Subtract the new number by the original number
609 - 779 = -170
-170 ÷ 779 = -0.21822849807445444
-0.21822849807445444 x 100 = -21.82%