-39.84% is the change from 502 to 302
Calculation steps:
[( 302 - 502 ) ÷ 502] x 100 = -39.84%
Formula
Percentage change = [(302 - 502) / 502] x 100
Subtract the new number by the original number
302 - 502 = -200
-200 ÷ 502 = -0.398406374501992
-0.398406374501992 x 100 = -39.84%