-66.79% is the change from 780 to 259
Calculation steps:
[( 259 - 780 ) ÷ 780] x 100 = -66.79%
Formula
Percentage change = [(259 - 780) / 780] x 100
Subtract the new number by the original number
259 - 780 = -521
-521 ÷ 780 = -0.6679487179487179
-0.6679487179487179 x 100 = -66.79%