1573.33% is the change from 15 to 251
Calculation steps:
[( 251 - 15 ) ÷ 15] x 100 = 1573.33%
Formula
Percentage change = [(251 - 15) / 15] x 100
Subtract the new number by the original number
251 - 15 = 236
236 ÷ 15 = 15.733333333333333
15.733333333333333 x 100 = 1573.33%