-0.39% is the change from 778 to 775
Calculation steps:
[( 775 - 778 ) ÷ 778] x 100 = -0.39%
Formula
Percentage change = [(775 - 778) / 778] x 100
Subtract the new number by the original number
775 - 778 = -3
-3 ÷ 778 = -0.0038560411311053984
-0.0038560411311053984 x 100 = -0.39%