81.05% is the change from 306 to 554
Calculation steps:
[( 554 - 306 ) ÷ 306] x 100 = 81.05%
Formula
Percentage change = [(554 - 306) / 306] x 100
Subtract the new number by the original number
554 - 306 = 248
248 ÷ 306 = 0.8104575163398693
0.8104575163398693 x 100 = 81.05%