7.45% is the change from 550 to 591
Calculation steps:
[( 591 - 550 ) ÷ 550] x 100 = 7.45%
Formula
Percentage change = [(591 - 550) / 550] x 100
Subtract the new number by the original number
591 - 550 = 41
41 ÷ 550 = 0.07454545454545454
0.07454545454545454 x 100 = 7.45%