2.91% is the change from 550 to 566
Calculation steps:
[( 566 - 550 ) ÷ 550] x 100 = 2.91%
Formula
Percentage change = [(566 - 550) / 550] x 100
Subtract the new number by the original number
566 - 550 = 16
16 ÷ 550 = 0.02909090909090909
0.02909090909090909 x 100 = 2.91%