50.5% is the change from 402 to 605
Calculation steps:
[( 605 - 402 ) ÷ 402] x 100 = 50.5%
Formula
Percentage change = [(605 - 402) / 402] x 100
Subtract the new number by the original number
605 - 402 = 203
203 ÷ 402 = 0.5049751243781094
0.5049751243781094 x 100 = 50.5%