3393.33% is the change from 15 to 524
Calculation steps:
[( 524 - 15 ) ÷ 15] x 100 = 3393.33%
Formula
Percentage change = [(524 - 15) / 15] x 100
Subtract the new number by the original number
524 - 15 = 509
509 ÷ 15 = 33.93333333333333
33.93333333333333 x 100 = 3393.33%