2773.33% is the change from 15 to 431
Calculation steps:
[( 431 - 15 ) ÷ 15] x 100 = 2773.33%
Formula
Percentage change = [(431 - 15) / 15] x 100
Subtract the new number by the original number
431 - 15 = 416
416 ÷ 15 = 27.733333333333334
27.733333333333334 x 100 = 2773.33%