-38.51% is the change from 522 to 321
Calculation steps:
[( 321 - 522 ) ÷ 522] x 100 = -38.51%
Formula
Percentage change = [(321 - 522) / 522] x 100
Subtract the new number by the original number
321 - 522 = -201
-201 ÷ 522 = -0.3850574712643678
-0.3850574712643678 x 100 = -38.51%