90.2% is the change from 306 to 582
Calculation steps:
[( 582 - 306 ) ÷ 306] x 100 = 90.2%
Formula
Percentage change = [(582 - 306) / 306] x 100
Subtract the new number by the original number
582 - 306 = 276
276 ÷ 306 = 0.9019607843137255
0.9019607843137255 x 100 = 90.2%