161.54% is the change from 13 to 34
Calculation steps:
[( 34 - 13 ) ÷ 13] x 100 = 161.54%
Formula
Percentage change = [(34 - 13) / 13] x 100
Subtract the new number by the original number
34 - 13 = 21
21 ÷ 13 = 1.6153846153846154
1.6153846153846154 x 100 = 161.54%