3.33% is the change from 601 to 621
Calculation steps:
[( 621 - 601 ) ÷ 601] x 100 = 3.33%
Formula
Percentage change = [(621 - 601) / 601] x 100
Subtract the new number by the original number
621 - 601 = 20
20 ÷ 601 = 0.033277870216306155
0.033277870216306155 x 100 = 3.33%