2431.25% is the change from 16 to 405
Calculation steps:
[( 405 - 16 ) ÷ 16] x 100 = 2431.25%
Formula
Percentage change = [(405 - 16) / 16] x 100
Subtract the new number by the original number
405 - 16 = 389
389 ÷ 16 = 24.3125
24.3125 x 100 = 2431.25%