97.06% is the change from 306 to 603
Calculation steps:
[( 603 - 306 ) ÷ 306] x 100 = 97.06%
Formula
Percentage change = [(603 - 306) / 306] x 100
Subtract the new number by the original number
603 - 306 = 297
297 ÷ 306 = 0.9705882352941176
0.9705882352941176 x 100 = 97.06%