-40.2% is the change from 505 to 302
Calculation steps:
[( 302 - 505 ) ÷ 505] x 100 = -40.2%
Formula
Percentage change = [(302 - 505) / 505] x 100
Subtract the new number by the original number
302 - 505 = -203
-203 ÷ 505 = -0.401980198019802
-0.401980198019802 x 100 = -40.2%