-33.38% is the change from 764 to 509
Calculation steps:
[( 509 - 764 ) ÷ 764] x 100 = -33.38%
Formula
Percentage change = [(509 - 764) / 764] x 100
Subtract the new number by the original number
509 - 764 = -255
-255 ÷ 764 = -0.3337696335078534
-0.3337696335078534 x 100 = -33.38%