-36.5% is the change from 800 to 508
Calculation steps:
[( 508 - 800 ) ÷ 800] x 100 = -36.5%
Formula
Percentage change = [(508 - 800) / 800] x 100
Subtract the new number by the original number
508 - 800 = -292
-292 ÷ 800 = -0.365
-0.365 x 100 = -36.5%