3.16% is the change from 601 to 620
Calculation steps:
[( 620 - 601 ) ÷ 601] x 100 = 3.16%
Formula
Percentage change = [(620 - 601) / 601] x 100
Subtract the new number by the original number
620 - 601 = 19
19 ÷ 601 = 0.03161397670549085
0.03161397670549085 x 100 = 3.16%