50% is the change from 604 to 906
Calculation steps:
[( 906 - 604 ) ÷ 604] x 100 = 50%
Formula
Percentage change = [(906 - 604) / 604] x 100
Subtract the new number by the original number
906 - 604 = 302
302 ÷ 604 = 0.5
0.5 x 100 = 50%
Example