3.16% is the change from 602 to 621
Calculation steps:
[( 621 - 602 ) ÷ 602] x 100 = 3.16%
Formula
Percentage change = [(621 - 602) / 602] x 100
Subtract the new number by the original number
621 - 602 = 19
19 ÷ 602 = 0.03156146179401993
0.03156146179401993 x 100 = 3.16%