41.82% is the change from 550 to 780
Calculation steps:
[( 780 - 550 ) ÷ 550] x 100 = 41.82%
Formula
Percentage change = [(780 - 550) / 550] x 100
Subtract the new number by the original number
780 - 550 = 230
230 ÷ 550 = 0.41818181818181815
0.41818181818181815 x 100 = 41.82%