2.2% is the change from 545 to 557
Calculation steps:
[( 557 - 545 ) ÷ 545] x 100 = 2.2%
Formula
Percentage change = [(557 - 545) / 545] x 100
Subtract the new number by the original number
557 - 545 = 12
12 ÷ 545 = 0.022018348623853212
0.022018348623853212 x 100 = 2.2%