-18.25% is the change from 778 to 636
Calculation steps:
[( 636 - 778 ) ÷ 778] x 100 = -18.25%
Formula
Percentage change = [(636 - 778) / 778] x 100
Subtract the new number by the original number
636 - 778 = -142
-142 ÷ 778 = -0.18251928020565553
-0.18251928020565553 x 100 = -18.25%