-67.18% is the change from 780 to 256
Calculation steps:
[( 256 - 780 ) ÷ 780] x 100 = -67.18%
Formula
Percentage change = [(256 - 780) / 780] x 100
Subtract the new number by the original number
256 - 780 = -524
-524 ÷ 780 = -0.6717948717948717
-0.6717948717948717 x 100 = -67.18%