-16.43% is the change from 621 to 519
Calculation steps:
[( 519 - 621 ) ÷ 621] x 100 = -16.43%
Formula
Percentage change = [(519 - 621) / 621] x 100
Subtract the new number by the original number
519 - 621 = -102
-102 ÷ 621 = -0.1642512077294686
-0.1642512077294686 x 100 = -16.43%