58.9% is the change from 399 to 634
Calculation steps:
[( 634 - 399 ) ÷ 399] x 100 = 58.9%
Formula
Percentage change = [(634 - 399) / 399] x 100
Subtract the new number by the original number
634 - 399 = 235
235 ÷ 399 = 0.5889724310776943
0.5889724310776943 x 100 = 58.9%