684.62% is the change from 13 to 102
Calculation steps:
[( 102 - 13 ) ÷ 13] x 100 = 684.62%
Formula
Percentage change = [(102 - 13) / 13] x 100
Subtract the new number by the original number
102 - 13 = 89
89 ÷ 13 = 6.846153846153846
6.846153846153846 x 100 = 684.62%