3.72% is the change from 537 to 557
Calculation steps:
[( 557 - 537 ) ÷ 537] x 100 = 3.72%
Formula
Percentage change = [(557 - 537) / 537] x 100
Subtract the new number by the original number
557 - 537 = 20
20 ÷ 537 = 0.037243947858473
0.037243947858473 x 100 = 3.72%