1233.33% is the change from 15 to 200
Calculation steps:
[( 200 - 15 ) ÷ 15] x 100 = 1233.33%
Formula
Percentage change = [(200 - 15) / 15] x 100
Subtract the new number by the original number
200 - 15 = 185
185 ÷ 15 = 12.333333333333334
12.333333333333334 x 100 = 1233.33%