400% is the change from 102 to 510
Calculation steps:
[( 510 - 102 ) ÷ 102] x 100 = 400%
Formula
Percentage change = [(510 - 102) / 102] x 100
Subtract the new number by the original number
510 - 102 = 408
408 ÷ 102 = 4
4 x 100 = 400%
Example