338.46% is the change from 39 to 171
Calculation steps:
[( 171 - 39 ) ÷ 39] x 100 = 338.46%
Formula
Percentage change = [(171 - 39) / 39] x 100
Subtract the new number by the original number
171 - 39 = 132
132 ÷ 39 = 3.3846153846153846
3.3846153846153846 x 100 = 338.46%