-36.85% is the change from 521 to 329
Calculation steps:
[( 329 - 521 ) ÷ 521] x 100 = -36.85%
Formula
Percentage change = [(329 - 521) / 521] x 100
Subtract the new number by the original number
329 - 521 = -192
-192 ÷ 521 = -0.3685220729366603
-0.3685220729366603 x 100 = -36.85%