51.38% is the change from 399 to 604
Calculation steps:
[( 604 - 399 ) ÷ 399] x 100 = 51.38%
Formula
Percentage change = [(604 - 399) / 399] x 100
Subtract the new number by the original number
604 - 399 = 205
205 ÷ 399 = 0.5137844611528822
0.5137844611528822 x 100 = 51.38%