106.21% is the change from 306 to 631
Calculation steps:
[( 631 - 306 ) ÷ 306] x 100 = 106.21%
Formula
Percentage change = [(631 - 306) / 306] x 100
Subtract the new number by the original number
631 - 306 = 325
325 ÷ 306 = 1.0620915032679739
1.0620915032679739 x 100 = 106.21%