-6.43% is the change from 778 to 728
Calculation steps:
[( 728 - 778 ) ÷ 778] x 100 = -6.43%
Formula
Percentage change = [(728 - 778) / 778] x 100
Subtract the new number by the original number
728 - 778 = -50
-50 ÷ 778 = -0.06426735218508997
-0.06426735218508997 x 100 = -6.43%