3.15% is the change from 539 to 556
Calculation steps:
[( 556 - 539 ) ÷ 539] x 100 = 3.15%
Formula
Percentage change = [(556 - 539) / 539] x 100
Subtract the new number by the original number
556 - 539 = 17
17 ÷ 539 = 0.03153988868274583
0.03153988868274583 x 100 = 3.15%