81.52% is the change from 303 to 550
Calculation steps:
[( 550 - 303 ) ÷ 303] x 100 = 81.52%
Formula
Percentage change = [(550 - 303) / 303] x 100
Subtract the new number by the original number
550 - 303 = 247
247 ÷ 303 = 0.8151815181518152
0.8151815181518152 x 100 = 81.52%