285.71% is the change from 105 to 405
Calculation steps:
[( 405 - 105 ) ÷ 105] x 100 = 285.71%
Formula
Percentage change = [(405 - 105) / 105] x 100
Subtract the new number by the original number
405 - 105 = 300
300 ÷ 105 = 2.857142857142857
2.857142857142857 x 100 = 285.71%