395.1% is the change from 102 to 505
Calculation steps:
[( 505 - 102 ) ÷ 102] x 100 = 395.1%
Formula
Percentage change = [(505 - 102) / 102] x 100
Subtract the new number by the original number
505 - 102 = 403
403 ÷ 102 = 3.950980392156863
3.950980392156863 x 100 = 395.1%