2793.33% is the change from 15 to 434
Calculation steps:
[( 434 - 15 ) ÷ 15] x 100 = 2793.33%
Formula
Percentage change = [(434 - 15) / 15] x 100
Subtract the new number by the original number
434 - 15 = 419
419 ÷ 15 = 27.933333333333334
27.933333333333334 x 100 = 2793.33%