-36.81% is the change from 508 to 321
Calculation steps:
[( 321 - 508 ) ÷ 508] x 100 = -36.81%
Formula
Percentage change = [(321 - 508) / 508] x 100
Subtract the new number by the original number
321 - 508 = -187
-187 ÷ 508 = -0.36811023622047245
-0.36811023622047245 x 100 = -36.81%