42.11% is the change from 285 to 405
Calculation steps:
[( 405 - 285 ) ÷ 285] x 100 = 42.11%
Formula
Percentage change = [(405 - 285) / 285] x 100
Subtract the new number by the original number
405 - 285 = 120
120 ÷ 285 = 0.42105263157894735
0.42105263157894735 x 100 = 42.11%