-34.32% is the change from 778 to 511
Calculation steps:
[( 511 - 778 ) ÷ 778] x 100 = -34.32%
Formula
Percentage change = [(511 - 778) / 778] x 100
Subtract the new number by the original number
511 - 778 = -267
-267 ÷ 778 = -0.34318766066838047
-0.34318766066838047 x 100 = -34.32%