3.44% is the change from 581 to 601
Calculation steps:
[( 601 - 581 ) ÷ 581] x 100 = 3.44%
Formula
Percentage change = [(601 - 581) / 581] x 100
Subtract the new number by the original number
601 - 581 = 20
20 ÷ 581 = 0.03442340791738382
0.03442340791738382 x 100 = 3.44%