58.15% is the change from 399 to 631
Calculation steps:
[( 631 - 399 ) ÷ 399] x 100 = 58.15%
Formula
Percentage change = [(631 - 399) / 399] x 100
Subtract the new number by the original number
631 - 399 = 232
232 ÷ 399 = 0.581453634085213
0.581453634085213 x 100 = 58.15%