-39.44% is the change from 502 to 304
Calculation steps:
[( 304 - 502 ) ÷ 502] x 100 = -39.44%
Formula
Percentage change = [(304 - 502) / 502] x 100
Subtract the new number by the original number
304 - 502 = -198
-198 ÷ 502 = -0.3944223107569721
-0.3944223107569721 x 100 = -39.44%