-37.43% is the change from 513 to 321
Calculation steps:
[( 321 - 513 ) ÷ 513] x 100 = -37.43%
Formula
Percentage change = [(321 - 513) / 513] x 100
Subtract the new number by the original number
321 - 513 = -192
-192 ÷ 513 = -0.3742690058479532
-0.3742690058479532 x 100 = -37.43%