99.68% is the change from 312 to 623
Calculation steps:
[( 623 - 312 ) ÷ 312] x 100 = 99.68%
Formula
Percentage change = [(623 - 312) / 312] x 100
Subtract the new number by the original number
623 - 312 = 311
311 ÷ 312 = 0.9967948717948718
0.9967948717948718 x 100 = 99.68%