3.64% is the change from 55 to 57
Calculation steps:
[( 57 - 55 ) ÷ 55] x 100 = 3.64%
Formula
Percentage change = [(57 - 55) / 55] x 100
Subtract the new number by the original number
57 - 55 = 2
2 ÷ 55 = 0.03636363636363636
0.03636363636363636 x 100 = 3.64%