2753.33% is the change from 15 to 428
Calculation steps:
[( 428 - 15 ) ÷ 15] x 100 = 2753.33%
Formula
Percentage change = [(428 - 15) / 15] x 100
Subtract the new number by the original number
428 - 15 = 413
413 ÷ 15 = 27.533333333333335
27.533333333333335 x 100 = 2753.33%