-56.41% is the change from 780 to 340
Calculation steps:
[( 340 - 780 ) ÷ 780] x 100 = -56.41%
Formula
Percentage change = [(340 - 780) / 780] x 100
Subtract the new number by the original number
340 - 780 = -440
-440 ÷ 780 = -0.5641025641025641
-0.5641025641025641 x 100 = -56.41%