-3.21% is the change from 780 to 755
Calculation steps:
[( 755 - 780 ) ÷ 780] x 100 = -3.21%
Formula
Percentage change = [(755 - 780) / 780] x 100
Subtract the new number by the original number
755 - 780 = -25
-25 ÷ 780 = -0.03205128205128205
-0.03205128205128205 x 100 = -3.21%