-36.44% is the change from 505 to 321
Calculation steps:
[( 321 - 505 ) ÷ 505] x 100 = -36.44%
Formula
Percentage change = [(321 - 505) / 505] x 100
Subtract the new number by the original number
321 - 505 = -184
-184 ÷ 505 = -0.36435643564356435
-0.36435643564356435 x 100 = -36.44%