-37.25% is the change from 800 to 502
Calculation steps:
[( 502 - 800 ) ÷ 800] x 100 = -37.25%
Formula
Percentage change = [(502 - 800) / 800] x 100
Subtract the new number by the original number
502 - 800 = -298
-298 ÷ 800 = -0.3725
-0.3725 x 100 = -37.25%