580% is the change from 15 to 102
Calculation steps:
[( 102 - 15 ) ÷ 15] x 100 = 580%
Formula
Percentage change = [(102 - 15) / 15] x 100
Subtract the new number by the original number
102 - 15 = 87
87 ÷ 15 = 5.8
5.8 x 100 = 580%
Example