-18.46% is the change from 780 to 636
Calculation steps:
[( 636 - 780 ) ÷ 780] x 100 = -18.46%
Formula
Percentage change = [(636 - 780) / 780] x 100
Subtract the new number by the original number
636 - 780 = -144
-144 ÷ 780 = -0.18461538461538463
-0.18461538461538463 x 100 = -18.46%