2.73% is the change from 550 to 565
Calculation steps:
[( 565 - 550 ) ÷ 550] x 100 = 2.73%
Formula
Percentage change = [(565 - 550) / 550] x 100
Subtract the new number by the original number
565 - 550 = 15
15 ÷ 550 = 0.02727272727272727
0.02727272727272727 x 100 = 2.73%