-20.57% is the change from 778 to 618
Calculation steps:
[( 618 - 778 ) ÷ 778] x 100 = -20.57%
Formula
Percentage change = [(618 - 778) / 778] x 100
Subtract the new number by the original number
618 - 778 = -160
-160 ÷ 778 = -0.20565552699228792
-0.20565552699228792 x 100 = -20.57%