-20.64% is the change from 780 to 619
Calculation steps:
[( 619 - 780 ) ÷ 780] x 100 = -20.64%
Formula
Percentage change = [(619 - 780) / 780] x 100
Subtract the new number by the original number
619 - 780 = -161
-161 ÷ 780 = -0.2064102564102564
-0.2064102564102564 x 100 = -20.64%