660% is the change from 15 to 114
Calculation steps:
[( 114 - 15 ) ÷ 15] x 100 = 660%
Formula
Percentage change = [(114 - 15) / 15] x 100
Subtract the new number by the original number
114 - 15 = 99
99 ÷ 15 = 6.6
6.6 x 100 = 660%
Example