2893.33% is the change from 15 to 449
Calculation steps:
[( 449 - 15 ) ÷ 15] x 100 = 2893.33%
Formula
Percentage change = [(449 - 15) / 15] x 100
Subtract the new number by the original number
449 - 15 = 434
434 ÷ 15 = 28.933333333333334
28.933333333333334 x 100 = 2893.33%