32.36% is the change from 550 to 728
Calculation steps:
[( 728 - 550 ) ÷ 550] x 100 = 32.36%
Formula
Percentage change = [(728 - 550) / 550] x 100
Subtract the new number by the original number
728 - 550 = 178
178 ÷ 550 = 0.3236363636363636
0.3236363636363636 x 100 = 32.36%