-16.91% is the change from 621 to 516
Calculation steps:
[( 516 - 621 ) ÷ 621] x 100 = -16.91%
Formula
Percentage change = [(516 - 621) / 621] x 100
Subtract the new number by the original number
516 - 621 = -105
-105 ÷ 621 = -0.16908212560386474
-0.16908212560386474 x 100 = -16.91%