103.59% is the change from 306 to 623
Calculation steps:
[( 623 - 306 ) ÷ 306] x 100 = 103.59%
Formula
Percentage change = [(623 - 306) / 306] x 100
Subtract the new number by the original number
623 - 306 = 317
317 ÷ 306 = 1.0359477124183007
1.0359477124183007 x 100 = 103.59%