-20.03% is the change from 779 to 623
Calculation steps:
[( 623 - 779 ) ÷ 779] x 100 = -20.03%
Formula
Percentage change = [(623 - 779) / 779] x 100
Subtract the new number by the original number
623 - 779 = -156
-156 ÷ 779 = -0.20025673940949937
-0.20025673940949937 x 100 = -20.03%