2573.33% is the change from 15 to 401
Calculation steps:
[( 401 - 15 ) ÷ 15] x 100 = 2573.33%
Formula
Percentage change = [(401 - 15) / 15] x 100
Subtract the new number by the original number
401 - 15 = 386
386 ÷ 15 = 25.733333333333334
25.733333333333334 x 100 = 2573.33%