-14.87% is the change from 780 to 664
Calculation steps:
[( 664 - 780 ) ÷ 780] x 100 = -14.87%
Formula
Percentage change = [(664 - 780) / 780] x 100
Subtract the new number by the original number
664 - 780 = -116
-116 ÷ 780 = -0.14871794871794872
-0.14871794871794872 x 100 = -14.87%