-39.92% is the change from 501 to 301
Calculation steps:
[( 301 - 501 ) ÷ 501] x 100 = -39.92%
Formula
Percentage change = [(301 - 501) / 501] x 100
Subtract the new number by the original number
301 - 501 = -200
-200 ÷ 501 = -0.3992015968063872
-0.3992015968063872 x 100 = -39.92%