97.49% is the change from 319 to 630
Calculation steps:
[( 630 - 319 ) ÷ 319] x 100 = 97.49%
Formula
Percentage change = [(630 - 319) / 319] x 100
Subtract the new number by the original number
630 - 319 = 311
311 ÷ 319 = 0.9749216300940439
0.9749216300940439 x 100 = 97.49%