-2.58% is the change from 621 to 605
Calculation steps:
[( 605 - 621 ) ÷ 621] x 100 = -2.58%
Formula
Percentage change = [(605 - 621) / 621] x 100
Subtract the new number by the original number
605 - 621 = -16
-16 ÷ 621 = -0.02576489533011272
-0.02576489533011272 x 100 = -2.58%